Patent US2423103A successfully refreshed from Google Patents.
US2920000A
Expired / Lapsed
US
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Removable valve Collagen article and the manufacture thereof
Assignee: Ethicon Inc
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Filing: 1958-10-22
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Granted: 1960-01-05
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Expires: 1978-10-22
Abstract
No abstract record available.
Inventors
- 👤 Irving A Ward Irving A Ward
- 👤 Harold R Hochstadt H Hochstadt
- 👤 Emanuel R Lieberman Lieberman
- 👤 Ernest H Bucknell Ern Bucknell
- 👤 Lawrence E Irell Lawrenc Irell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016; A61; A61L; A61L17/00; A61L17/06; A61L17/08; D; D01; D01F; D01F4/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/84
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
IN A PROCESS FOR THE EXTRUSION OF A HOMOGENOUS COLLAGEN DISPERSION TO FORM A SHAPED ARTICLE, THE IMPROVEMENT WHICH COMPRISES SWELLING AND DISPERSING COLLAGEN FIBERS DERIVED FROM ANIMAL TENDONS IN AQUEOUS SOLUTION OF CYANOACETIC ACID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |