Patents by Inventor Ruey J. Yu

Ruey J. Yu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5561159
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle tropic acid or a topically effective salt thereof.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 1, 1996
    Assignee: Tristrata Technology, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5561153
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle mucic acid or a topically effective salt thereof, or mucolactone.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 1, 1996
    Assignee: Tristrata Technology, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5561156
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle methyllactic acid or a topically effective salt thereof.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 1, 1996
    Assignee: Tristrata Technology, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5561155
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle galacturonic acid or a topically effective salt thereof, or galacturonolactone.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: October 1, 1996
    Assignee: Tristrata Technology, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5561157
    Abstract: Composition and method for enhancing therapeutic effects of topically applied agents are disclosed. The cosmetic or therapeutic composition may include one or more of cosmetic or pharmaceutical agents present in a total amount of from 0.01 to 40 percent and one or more of hydroxycarboxylic acids or related compounds present in a total amount of from 0.01 to 99 percent by weight of the total composition. The cosmetic and pharmaceutical agents may include but not limited to age spots, wrinkles and keratoses removing agents; vitamins; aloes; sun screens; tanning, depigmenting and shampooing agents; antiyeasts; antifungal, antibacterial and antiviral agents; topical bronchial dilators and topical cardiovascular agents; hormonal agents; vasodilators; retinoids and other dermatological agents. The hydroxycarboxylic acids and related compounds include organic alpha and beta hydroxycarboxylic acids, alpha and beta ketocarboxylic acids and salts thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 1, 1996
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5556882
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle benzilic acid or a topically effective salt thereof.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 17, 1996
    Assignee: Tristrata Technology, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5554651
    Abstract: Composition and method for enhancing therapeutic effects of topically applied agents are disclosed. The cosmetic or therapeutic composition may include one or more of cosmetic or pharmaceutical agents present in a total amount of from 0.01 to 40 percent and one or more of hydroxycarboxylic acids or related compounds present in a total amount of from 0.01 to 99 percent by weight of the total composition. The cosmetic and pharmaceutical agents may include but not limited to age spots, wrinkles and keratoses removing agents; vitamins; aloes; sun screens; tanning, depigmenting and shampooing agents; antiyeasts; antifungal, antibacterial and antiviral agents; topical bronchial dilators and topical cardiovascular agents; hormonal agents; vasodilators; retinoids and other dermatological agents. The hydroxycarboxylic acids and related compounds include organic alpha and beta hydroxycarboxylic acids, alpha and beta ketocarboxylic acids and salts thereof.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 10, 1996
    Assignee: Tristrata, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5554652
    Abstract: Composition and method for enhancing therapeutic effects of topically applied agents are disclosed. The cosmetic or therapeutic composition may include one or more of cosmetic or pharmaceutical agents present in a total amount of from 0.01 to 40 percent and one or more of hydroxycarboxylic acids or related compounds present in a total amount of from 0.01 to 99 percent by weight of the total composition. The cosmetic and pharmaceutical agents may include but not limited to age spots, wrinkles and keratoses removing agents; vitamins; aloes; sun screens; tanning, depigmenting and shampooing agents; antiyeasts; antifungal, antibacterial and antiviral agents; topical bronchial dilators and topical cardiovascular agents; hormonal agents; vasodilators; retinoids and other dermatological agents. The hydroxycarboxylic acids and related compounds include organic alpha and beta hydroxycarboxylic acids, alpha and beta ketocarboxylic acids and salts thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 10, 1996
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5554597
    Abstract: Uses of topical compositions comprising a 2-hydroxycarboxylic acid or related compound to alleviate or improve signs of skin, nail and hair changes associated with intrinsic or extrinsic aging are disclosed. 2-Hydroxycarboxylic acids and their related compounds include, for example, 2-hydroxyethanoic acid, 2-hydroxypropanoic acid, 2-methyl 2-hydroxypropanoic acid, 2-phenyl 2-hydroxyethanoic acid, 2-phenyl 2-methyl 2-hydroxyethanoic acid, 2-phenyl 3-hydroxypropanoic acid, 2,2-diphenyl 2-hydroxyethanoic acid, 2-hydroxybutane-1,4-dioic acid, 2,3-hihydroxybutane-1,4-dioic acid, 2-carboxy 2-hydroxypentane-1,5-dioic acid, 2-ketopropanoic acid, methyl 2-ketopropanoate, ethyl 2-ketopropanoate, and gluconolactone.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 10, 1996
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5554654
    Abstract: Composition and method for enhancing therapeutic effects of topically applied agents are disclosed. The cosmetic or therapeutic composition may include one or more of cosmetic or pharmaceutical agents present in a total amount of from 0.01 to 40 percent and one or more of hydroxycarboxylic acids or related compounds present in a total amount of from 0.01 to 99 percent by weight of the total composition. The cosmetic and pharmaceutical agents may include but not limited to age spots, wrinkles and keratoses removing agents; vitamins; aloes; sun screens; tanning, depigmenting and shampooing agents; antiyeasts; antifungal, antibacterial and antiviral agents; topical bronchial dilators and topical cardiovascular agents; hormonal agents; vasodilators; retinoids and other dermatological agents. The hydroxycarboxylic acids and related compounds include organic alpha and beta hydroxycarboxylic acids, alpha and beta ketocarboxylic acids and salts thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 10, 1996
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5550158
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle glucoheptonic acid or a topically effective salt thereof.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 27, 1996
    Assignee: Tristrata, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5550154
    Abstract: A method for visibly reducing a facial wrinkle by topically applying to the wrinkle glucuronic acid or a topically effective salt thereof or glucuronolactone.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 27, 1996
    Assignee: Tristrata, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5547988
    Abstract: Uses of topical compositions comprising a 2-hydroxycarboxylic acid or related compound to alleviate or improve signs of skin, nail and hair changes associated with intrinsic or extrinsic aging are disclosed. 2-Hydroxycarboxylic acids and their related compounds include, for example, 2-hydroxyethanoic acid, 2-hydroxypropanoic acid 2-methyl 2-hydroxypropanoic acid, 2-phenyl 2-hydroxyethanoic acid, 2-phenyl 2-methyl 2-hydroxyethanoic acid, 2-phenyl 3-hydroxypropanoic acid, 2,2-diphenyl 2-hydroxyethanoic acid, 2-hydroxybutane-1,4-dioicacid, 2,3-hihydroxybutane-1,4-dioic acid, 2-carboxy 2-hydroxypentane-1,5-dioic acid, 2-ketopropanoic acid, methyl 2-ketopropanoate, ethyl 2-ketopropanoate, and gluconolactone.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: August 20, 1996
    Assignee: Tristrata Technology, Inc.
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5492935
    Abstract: Therapeutic as well as preventive measures to improve cosmetic conditions and to alleviate the symptoms of dermatologic disorders with retinal and its derivatives is disclosed. Cosmetic conditions and dermatologic disorders in humans and domestic animals in which retinal and its derivatives may be useful include age spots, wrinkles, warts, eczema, seborrheic keratoses, acne, oily skin, psoriasis, dandruff, xerosis, inflammatory and pruritic skin, disturbed keratinization, skin changes associated with aging and possibly viral infections. Retinal and its derivatives include their stereoisomers, for example, all-trans, 13-cis, 11-cis, 9-cis, 7-cis, 11,13-cis and 9,13-cis vitamin A aldehydes, their hydrate, hemiacetal and acetal forms, and their adduct compounds. Compositions containing retinal or its derivative may be administered systemically such as orally, or topically to the affected areas of the skin.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: February 20, 1996
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5470880
    Abstract: A method for visibly reducing a skin wrinkle by topically applying to the wrinkle citric acid or a topically salt thereof.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: November 28, 1995
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5422370
    Abstract: A method for visibly reducing a skin wrinkle by topically applying to the wrinkle lactic acid or a topically effective salt thereof.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: June 6, 1995
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5389677
    Abstract: Composition and method for enhancing therapeutic effects of topically applied agents are disclosed. The cosmetic or therapeutic composition may include one or more of cosmetic or pharmaceutical agents present in a total amount of from 0.01 to 40 percent and one or more of hydroxycarboxylic acids or related compounds present in a total amount of from 0.01 to 99 percent by weight of the total composition. The cosmetic and pharmaceutical agents may include but not limited to age spots, wrinkles and keratoses removing agents; vitamins; aloes; sun screens; tanning, depigmenting and shampooing agents; antiyeasts; antifungal, antibacterial and antiviral agents; topical bronchial dilators and topical cardiovascular agents; hormonal agents; vasodilators; retinoids and other dermatological agents. The hydroxycarboxylic acids and related compounds include organic alpha and beta hydroxycarboxylic acids, alpha and beta ketocarboxylic acids and salts thereof.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: February 14, 1995
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5385938
    Abstract: Preventive as well as therapeutic treatment to alleviate cosmetic conditions and symptoms of dermatologic disorders with amphoteric compositions containing alpha hydroxyacids, alpha ketoacids, related compounds or polymeric forms of hydroxyacids is disclosed. The cosmetic conditions and the dermatologic disorders in which the amphoteric compositions and the polymeric compounds may be useful include dry skin, dandruff, acne, keratoses, psoriasis, eczema, pruritus, age spots, lentigines, melasmas, wrinkles, warts, blemished skin, hyperpigmented skin, kyperkeratotic skin, inflammatory dermatoses, skin changes associated with aging, and skin requiring cleansers.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: January 31, 1995
    Inventors: Ruey J. Yu, Eugene J. Van Scott
  • Patent number: 5329182
    Abstract: An ATD pulse generator circuit (20) provides an ATD pulse at CMOS logic levels in response to a single-ended ECL level input signal transition. An emitter-follower input portion (21), a differential amplifier (23), and emitter-follower portion (25) converts the single-ended input signal to intermediate level differential signals. P-channel transistors (51 and 52) receive the intermediate level differential signals and provide complementary CMOS level outputs signals. Cross-coupled delay portion (29) prevents the N-channel transistors (55 and 56) from switching on until after a delay, causing both of the CMOS level output signals to remain at logic high levels for a predetermined time. Cross-coupling the N-channel transistors (55 and 56) also results in reduced power consumption. A NAND gate (31) receives the logic high levels and provides a CMOS level ATD pulse, the duration of which is adjustable.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: July 12, 1994
    Assignee: Motorola Inc.
    Inventor: Ruey J. Yu
  • Patent number: 5303191
    Abstract: A memory (30) includes input buffers (35, 38, 56), decoders (31, 32, 36), and a memory portion (34). The input buffers (35, 38, 56) include a delay circuit (82) which delays at least one transition of an input signal. The delay circuit (82) includes a compensation circuit (250) which compensates the delay circuit (82) for voltage, temperature, and processing variations. In one embodiment, the delay circuit (82) includes a CMOS inverter (102, 103) with an additional transistor (101) coupled between a source of an inverter transistor (102) and a corresponding power supply voltage. The compensation circuit (250) provides a bias voltage to bias a gate of the transistor (101) to determine the delay of the delay circuit (82). The compensation circuit (250) provides the bias voltage as that voltage which biases the transistor (101) to conduct a precision reference current.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: April 12, 1994
    Assignee: Motorola, Inc.
    Inventors: John W. Eagan, Scott G. Nogle, Ruey J. Yu