Patent US2637321A successfully refreshed from Google Patents.
US2637321A
Expired / Lapsed
US
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Shaped article and method of producing it
Assignee: Wyeth Holdings LLC
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Filing: 1951-09-27
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Granted: 1953-05-05
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Expires: 1971-09-27
Abstract
No abstract record available.
Inventors
- 👤 Cresswell Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:23
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/06; A61L17/08; D; D01; D01F; D01F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A SHAPED ARTICLE CONSISTING ESSENTIALLY OF REGENERATED COLLAGEN FREE FROM FIBERS AND ANY OTHER MATERIAL INSOLUBLE IN A DILUTE AQUEOUS SOLUTION OF AN ORGANIC ACID.
Claim 2
Dependent Claim
25 words
A SHAPED ARTICLE CONSISTING ESSENTIALLY OF REGENERATED COLLAGEN FREE FROM FIBERS AND ANY OTHER MATERIAL INSOLUBLE IN A DILUTE AQUEOUS SOLUTION OF AN ORGANIC ACID.
References Cited (Backward Citations)
US1949111A
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US2039262A
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US2120851A
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US2126344A
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US2517694A
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US2476293A
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US2475697A
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US2485958A
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |