Patents by Inventor William P. Langsdorf

William P. Langsdorf 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).

  • Carbamoylphosphonates
    Patent number: 4048156
    Abstract: This disclosure teaches a method for employing novel carbamoylphosphonates such as ammonium ethyl carbamoylphosphonate, ammonium isopropyl carbamoylphosphonate and ammonium allyl carbamoylphosphonate to regulate the growth rate of plants. SPCROSS REFERENCE TO RELATED APPLICATIONSThis application is a division of application Ser. No. 553,423, filed Feb. 26, 1975, now U.S. Pat. No. 3,997,544, which is a division of application Ser. No. 283,769, filed Aug. 25, 1972, now U.S. Pat. No. 3,846,512, which is a continuation-in-part of application Ser. No. 85,221, filed Oct. 29, 1970, now U.S. Pat. No. 3,819,353, which is a continuation-in-part of my application Ser. No. 803,962, filed Mar. 3, 1969, now abandoned, which was in turn a continuation-in-part of my earlier application Ser. No. 731,732, filed May 24, 1968, now U.S. Pat. No. 3,627,507.
    Type: Grant
    Filed: September 14, 1976
    Date of Patent: September 13, 1977
    Assignee: E. I Du Pont de Nemours and Company
    Inventor: William P. Langsdorf, Jr.
  • Plant growth regulant carbamoylphosphonates
    Patent number: 3997544
    Abstract: This disclosure teaches a method for employing novel carbamoylphosphonates such as ammonium ethyl carbamoylphosphonate, ammonium isopropyl carbamoylphosphonate and ammonium allyl carbamoylphosphonate to regulate the growth rate of plants.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: December 14, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William P. Langsdorf
  • Plant growth regulant carbamoylphosphonates
    Patent number: 3981870
    Abstract: This disclosure teaches a method for employing novel carbamoylphosphonates such as ammonium ethyl carbamoylphosphonate, ammonium isopropyl carbamoylphosphonate and ammonium allyl carbamoylphosphonate to regulate the growth rate of plants.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: September 21, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William P. Langsdorf
  • Carbamoylphosphonates
    Patent number: 3975464
    Abstract: This disclosure teaches a method for employing novel carbamoylphosphonates such as ammonium ethyl carbamoylphosphonate, ammonium isopropyl carbamoylphosphonate and ammonium allyl carbamoylphosphonate to regulate the growth rate of plants.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: August 17, 1976
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: William P. Langsdorf
  • Carbamoylphosphonates
    Patent number: 3952074
    Abstract: This disclosure teaches a method for employing novel carbamoylphosphonates such as ammonium ethyl carbamolyphosphonate, ammonium isopropyl carbamoylphosphonate and ammonium allyl carbamoylphosphonate to regulate the growth rate of plants.
    Type: Grant
    Filed: June 13, 1974
    Date of Patent: April 20, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William P. Langsdorf