Patent US3425064A successfully refreshed from Google Patents.
US3014024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen film
Assignee: Johnson and Johnson
•
Filing: 1958-03-19
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Granted: 1961-12-19
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Expires: 1978-03-19
Abstract
No abstract record available.
Inventors
- 👤 Emanuel R Lieberman
- 👤 Irving B Oneson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:53
CPC Classifications
C; C08; C08H; C08H1/00; A; A23; A23L; A23L13/00; A23L13/60; B; B29; B29C; B29C55/00; C08H1/06; C08J; C08J5/00; C08J5/18; C08L; C08L89/00; C08L89/04; C08L89/06; C08J2389/00; C08J2389/04; C08J2389/06; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A COLLAGEN FILM OF UNIFORM THICKNESS CHARACTERIZED BY A SUBSTANTIAL ORIENTATION OF COLLAGEN FIBERS IN A SINGLE DIRECTION AND A TENSILE STRENGTH IN THE DIRECTION OF ORIENTATION AT LEAST ABOUT 1.6 TIMES THE TENSILE STRENGTH IN A DIRECTION PERPENDICULAR TO THE DIRECTION OF ORIENTATION, PRODUCED BY CENTRIFUGING AN ACID DISPERSION OF COLLAGEN FIBERS TO FORM A FILM, SPRAYING THE FILM WITH AN ALKALINE REAGENT TO NEUTRALIZE THE ACID AND CONTINUING TO CENTRIFUGE UNTIL THE DISPERSING LIQUID HAS BEEN SUBSTANTIALLY REMOVED FROM THE FILM AND REMOVING THE FILM SO OBTAINED FROM THE CENTRIFUGE.
Claim 2
Dependent Claim
92 words
A COLLAGEN FILM OF UNIFORM THICKNESS CHARACTERIZED BY A SUBSTANTIAL ORIENTATION OF COLLAGEN FIBERS IN A SINGLE DIRECTION AND A TENSILE STRENGTH IN THE DIRECTION OF ORIENTATION AT LEAST ABOUT 1.6 TIMES THE TENSILE STRENGTH IN A DIRECTION PERPENDICULAR TO THE DIRECTION OF ORIENTATION, PRODUCED BY CENTRIFUGING AN ACID DISPERSION OF COLLAGEN FIBERS TO FORM A FILM, SPRAYING THE FILM WITH AN ALKALINE REAGENT TO NEUTRALIZE THE ACID AND CONTINUING TO CENTRIFUGE UNTIL THE DISPERSING LIQUID HAS BEEN SUBSTANTIALLY REMOVED FROM THE FILM AND REMOVING THE FILM SO OBTAINED FROM THE CENTRIFUGE.
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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) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |