US3036341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal casting of collagen to produce films and ribbons
Assignee: Wyeth Holdings LLC
•
Filing: 1957-12-23
•
Granted: 1962-05-29
•
Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Taylor Arthur Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:39
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/04; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS OF MAKING A THIN COLLAGEN RIBBON OF UNIFORM CROSS-SECTION WHICH COMPRISES: ROTATING RAPIDLY A MASS OF A MELTABLE WAX AT LEAST THE SURFACE OF WHICH IS IN MOLTEN FORM ABOUT AN AXIS TO FORM A LIQUID SURFACE CONCENTRIC WITH SAID AXIS, COOLING AND SOLIDIFYING THE WAX, TO FORM A SMOOTH SOLID FILM FORMING SURFACE WHICH IS CONCENTRIC WITH SAID AXIS, SPREADING INTERIORLY ON SAID SURFACE A THIN LAYER OF A DILUTE AQUEOUS REGENERABLE COLLAGEN MASS, EVAPORATING THE WATER TO FORM A FILM, WHILE CONTINUING TO RAPIDLY ROTATE; THEN DISCONTINUING THE RAPID ROTATION, CUTTING A HELIX THROUGH THE THUS FORMED FILM, TO FORM A RIBBON, AND REMOVING THE RIBBON FROM THE FORMING SURFACE.
Claim 2
Dependent Claim
114 words
A PROCESS OF MAKING A THIN COLLAGEN RIBBON OF UNIFORM CROSS-SECTION WHICH COMPRISES: ROTATING RAPIDLY A MASS OF A MELTABLE WAX AT LEAST THE SURFACE OF WHICH IS IN MOLTEN FORM ABOUT AN AXIS TO FORM A LIQUID SURFACE CONCENTRIC WITH SAID AXIS, COOLING AND SOLIDIFYING THE WAX, TO FORM A SMOOTH SOLID FILM FORMING SURFACE WHICH IS CONCENTRIC WITH SAID AXIS, SPREADING INTERIORLY ON SAID SURFACE A THIN LAYER OF A DILUTE AQUEOUS REGENERABLE COLLAGEN MASS, EVAPORATING THE WATER TO FORM A FILM, WHILE CONTINUING TO RAPIDLY ROTATE; THEN DISCONTINUING THE RAPID ROTATION, CUTTING A HELIX THROUGH THE THUS FORMED FILM, TO FORM A RIBBON, AND REMOVING THE RIBBON FROM THE FORMING SURFACE.
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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) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |