Patents by Inventor William A. Hallett
William A. Hallett 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: 6022307Abstract: The invention provides novel substituted dibenzothiophenes of Formulae (I), (II), (III) and (IV) which have antiangiogenic activity and further provides a method using substituted dibenzothiophenes of Formula (V) as antiangiogenic agents.Type: GrantFiled: June 28, 1999Date of Patent: February 8, 2000Assignee: American Cyanamid CompanyInventors: Mark E. Salvati, Nancy H. Eudy, William A. Hallett, Dennis William Powell
-
Patent number: 5877296Abstract: This invention describes carrier-drug conjugates prepared from disulfide analogs of the calicheamicin family of potent antitumor antibiotics and their derivatives, as well as similar analogs from related antitumor antibiotics such as the esperamicins. The carrier can be an antibody, growth factor, or steroid which targets an undesired population of cells, such as those of a tumor. Whole protein carriers as well as their antigen-recognizing fragments and their chemically or genetically manipulated counterparts are useful for the targeting portion of the conjugates. This invention includes compounds required for the synthesis of these conjugates, appropriate pharmaceutical compositions of the carrier-drug conjugates, and their method of use.Type: GrantFiled: May 26, 1995Date of Patent: March 2, 1999Assignee: American Cyanamid CompanyInventors: Philip Ross Hamann, Lois Hinman, Irwin Hollander, Ryan Holcomb, William Hallett, Hwei-Ru Tsou, Martin J. Weiss
-
Patent number: 5773001Abstract: This invention describes carrier-drug conjugates prepared from disulfide analogs of the calicheamicin family of potent antitumor antibiotics and their derivatives, as well as similar analogs from related antitumor antibiotics such as the esperamicins. The carrier can be an antibody, growth factor, or steroid which targets an undesired population of cells, such as those of a tumor. Whole protein carriers as well as their antigen-recognizing fragments and their chemically or genetically manipulated counterparts are useful for the targeting portion of the conjugates. This invention includes compounds required for the synthesis of these conjugates, appropriate pharmaceutical compositions of the carrier-drug conjugates, and their method of use.Type: GrantFiled: June 3, 1994Date of Patent: June 30, 1998Assignee: American Cyanamid CompanyInventors: Philip Ross Hamann, Lois Hinman, Irwin Hollander, Ryan Holcomb, William Hallett, Hwei-Ru Tsou, Martin J. Weiss
-
Patent number: 5767285Abstract: This invention describes carrier-drug conjugates prepared from disulfide analogs of the calicheamicin family of potent antitumor antibiotics and their derivatives, as well as similar analogs from related antitumor antibiotics such as the esperamicins. The carrier can be an antibody, growth factor, or steroid which targets an undesired population of cells, such as those of a tumor. Whole protein carriers as well as their antigen-recognizing fragments and their chemically or genetically manipulated counterparts are useful for the targeting portion of the conjugates. This invention includes compounds required for the synthesis of these conjugates, appropriate pharmaceutical compositions of the carrier-drug conjugates, and their method of use.Type: GrantFiled: June 5, 1995Date of Patent: June 16, 1998Assignee: American Cyanamid CompanyInventors: Philip Ross Hamann, Lois Hinman, Irwin Hollander, Ryan Holcomb, William Hallett, Hwei-Ru Tsou, Martin J. Weiss
-
Patent number: 5739116Abstract: This invention describes carrier-drug conjugates prepared from disulfide analogs of the calicheamicin family of potent antitumor antibiotics and their derivatives, as well as similar analogs from related antitumor antibiotics such as the esperamicins. The carrier can be an antibody, growth factor, or steroid which targets an undesired population of cells, such as those of a tumor. Whole protein carriers as well as their antigen-recognizing fragments and their chemically or genetically manipulated counterparts are useful for the targeting portion of the conjugates. This invention includes compounds required for the synthesis of these conjugates, appropriate pharmaceutical compositions of the carrier-drug conjugates, and their method of use.Type: GrantFiled: June 5, 1995Date of Patent: April 14, 1998Assignee: American Cyanamid CompanyInventors: Philip Ross Hamann, Lois Hinman, Irwin Hollander, Ryan Holcomb, William Hallett, Hwei-Ru Tsou, Martin J. Weiss
-
Patent number: 5719397Abstract: An apparatus for detecting the presence of a target material such as a multicomponent gas is disclosed. The apparatus includes a source of electromagnetic radiation and a device for dispersing the radiation into different frequency bands for targeting the material at different wavelengths corresponding to absorption bands in the material. Spaced apart optoelectric transducers detect the different frequency bands. A processor detects the changes in the output of the transducers occasioned by partial absorption of the electromagnetic radiation from the source by the target material. Processing means also compensates for temperature variations in the source.Type: GrantFiled: April 4, 1996Date of Patent: February 17, 1998Assignee: Spectrasense LimitedInventors: William A. Hallett, Joshua D. Silver
-
Patent number: 5639887Abstract: Compounds of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are herein described, A is a straight or branched (C.sub.2 -C.sub.12)alkyl or a phenyl moiety and B is a moiety of the formula: ##STR2## The compounds are effective in potentiating the activity of chemotherapeutic anti-cancer agents by increasing the sensitivity of multi-drug resistant cells to such chemotherapeutic agents.Type: GrantFiled: May 25, 1995Date of Patent: June 17, 1997Assignee: American Cyanamid CompanyInventors: Dennis Powell, Rolf Paul, William A. Hallett, Dan M. Berger, Minu D. Dutia
-
Patent number: 5561141Abstract: Compounds of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are herein described, A is a straight or branched (C.sub.2 -C.sub.12)alkyl or a phenyl moiety and B is a moiety of the formula: ##STR2## The compounds are effective in potentiating the activity of chemotherapeutic anti-cancer agents by increasing the sensitivity of multi-drug resistant cells to such chemotherapeutic agents.Type: GrantFiled: May 25, 1995Date of Patent: October 1, 1996Assignee: American Cyanamid CompanyInventors: Dennis Powell, Rolf Paul, William A. Hallett, Dan M. Berger, Minu D. Dutia
-
Patent number: 5550149Abstract: Compounds of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are herein described, A is a straight or branched (C.sub.2 -C.sub.12)alkyl or a phenyl moiety and B is a moiety of the formula: ##STR2## The compounds are effective in potentiating the activity of chemotherapeutic anti-cancer agents by increasing the sensitivity of multi-drug resistant cells to such chemotherapeutic agents.Type: GrantFiled: October 25, 1994Date of Patent: August 27, 1996Assignee: American Cyanamid CompanyInventors: Dennis Powell, Rolf Paul, William A. Hallett, Dan M. Berger, Minu D. Dutia
-
Patent number: 5387685Abstract: Compounds of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are herein described, A is a straight or branched (C.sub.2 -C.sub.12)alkyl or a phenyl moiety and B is a moiety of the formula: ##STR2## The compounds are effective in potentiating the activity of chemotherapeutic anti-cancer agents by increasing the sensitivity of multi-drug resistant cells to such chemotherapeutic agents.Type: GrantFiled: July 16, 1993Date of Patent: February 7, 1995Inventors: Dennis Powell, Rolf Paul, William A. Hallett, Dan M. Berger, Minu D. Dutia