Patent US4554256A successfully refreshed from Google Patents.
US4554256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antigen associated with early detection of mammalian pregnancy
Assignee: Idaho Research Foundation Inc
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Filing: 1983-07-21
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Granted: 1985-11-19
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Expires: 2003-07-21
Abstract
Abstract Early pregnancy can be determined by detection of a protein in serum, which protein is associated with the placental membrane. The protein is characterized by having an approximate molecular weight of 47,000 to 53,000 and an isoelectric point of from about 4.0-4.4.
Inventors
- 👤 R. Garth Sasser
- 👤 William C. Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:48
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/68; G01N33/689; G01N2800/00; G01N2800/36; G01N2800/368; Y; Y10; Y10S; Y10S436/00; Y10S436/804; Y10S436/811; Y10S436/814; Y10S436/815
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A method for detecting pregnancy of a bovine or ovine host, said method comprising: combining serum or blood from said host with antibody which specifically binds to Protein B, said Protein B being characterized by having a molecular weight in the range of about 47-53 kD, an isoelectric point in the range of about 4.0-4.4 and isolatable from bovine placental membrane homogenates, and detecting complex formation between said antibody and an antigen present in said blood or serum, wherein complex formation is indicative of pregnancy of said host.
Claim 2
Independent Claim
88 words
A method for detecting pregnancy of a bovine or ovine host, said method comprising: combining serum or blood from said host with antibody which specifically binds to Protein B, said Protein B being characterized by having a molecular weight in the range of about 47-53 kD, an isoelectric point in the range of about 4.0-4.4 and isolatable from bovine placental membrane homogenates, and detecting complex formation between said antibody and an antigen present in said blood or serum, wherein complex formation is indicative of pregnancy of said host.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein said complex formation is determined by measuring the presence or absence of labelled Protein B.
Claim 4
Dependent Claim
24 words
A method according to claim 1, wherein said complex formation is determined by measuring the presence or absence of labelled antibody to Protein B.
Claim 5
Dependent Claim
11 words
A method according to claim 1, wherein said host is bovine.
Claim 6
Dependent Claim
11 words
A method according to claim 1 wherein said host is bovine.
Claim 7
Dependent Claim
11 words
A method according to claim 1, wherein said host is ovine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |