Patent US4655943A successfully refreshed from Google Patents.
Patent US3862302A successfully refreshed from Google Patents.
US3862302A
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Pelletized pregnancy test reagents
Assignee: Akzona Inc
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Filing: 1971-10-04
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Granted: 1975-01-21
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Expires: 1991-10-04
Abstract
Abstract Pelletized analytical and immunological reagents are prepared in a stable accurate form containing predetermined and pretested measured amounts of substances capable of participating in analytical and immunological reactions, such as pregnancy tests, by forming these reagents into frozen and freeze-dried beads or spheres; a set of these pellets comprising an antiserum and an antigen is placed in a test vessel and moistened with the liquid to be tested and then allowed to stand until agglutination or precipitin reaction does or does not occur.
Inventors
- 👤 Richard Thompson Price
- 👤 Stuart Michael Bauer
- 👤 John Brownlee
- 👤 Bastiaan Cornelis Goverde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:53
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/74; G01N33/76; B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B01L; B01L3/00; B01L3/02; B01L3/0203; F; F25; F25C; F25C1/00; Y; Y10; Y10S; Y10S435/00; Y10S435/963; Y10S436/00; Y10S436/805; Y10S436/807; Y10S436/81; Y10S436/811; Y10S436/814; Y10S436/815; Y10S436/817; Y10S436/818; Y10S436/826
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A pregnancy test reagent adapted for detecting the presence of human chorionic gonadotropin in urine consisting essentially of a stable frozen and freeze-dried pellet containing a predetermined immunologically effective amount for test purposes of human chorionic gonadotropin antiserum together with an effective amount of a phosphate buffer.
References Cited (Backward Citations)
US3236732A
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US3344617A
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US3548051A
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US3654090A
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US3654090B1
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US3579306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |