US2838363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing filaments and sheets from procollagen
Assignee: Armour and Co
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Filing: 1954-10-19
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Granted: 1958-06-10
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Expires: 1974-10-19
Abstract
No abstract record available.
Inventors
- 👤 Veis Arthur
- 👤 Cohen Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:52
CPC Classifications
D; D01; D01F; D01F4/00; C; C09; C09H; C09H1/00; C09H1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF PRODUCING A MATERIAL OF RELATIVELY HIGH WET STRENGTH FROM PROCOLLAGEN, COMPRISING CONVERTING AN AQUEOUS ACID SOLUTION OF PROCOLLAGEN TO A GEL BY DIALYZING SAID SOLUTION AGAINST WATER, SAID DIALYSIS BEING CARRIED OUT AT A RATE SLOW ENOUGH TO FORM A GEL HAVING A SUBSTANTIALLY HOMOGENEOUS APPEARANCE TO THE NAKED EYE, AGING THE HOMOGENEOUS GEL IN WATER TO INCREASE ITS COHESIVE STRENGHT, AND THEN APPLYING STRESS WITH A DIRECTIONAL ORIENTATION TO THE AGED GEL WHILE EXUDING WATER THEREFROM.
Claim 2
Independent Claim
80 words
THE METHOD OF PRODUCING A MATERIAL OF RELATIVELY HIGH WET STRENGTH FROM PROCOLLAGEN, COMPRISING CONVERTING AN AQUEOUS ACID SOLUTION OF PROCOLLAGEN TO A GEL BY DIALYZING SAID SOLUTION AGAINST WATER, SAID DIALYSIS BEING CARRIED OUT AT A RATE SLOW ENOUGH TO FORM A GEL HAVING A SUBSTANTIALLY HOMOGENEOUS APPEARANCE TO THE NAKED EYE, AGING THE HOMOGENEOUS GEL IN WATER TO INCREASE ITS COHESIVE STRENGHT, AND THEN APPLYING STRESS WITH A DIRECTIONAL ORIENTATION TO THE AGED GEL WHILE EXUDING WATER THEREFROM.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |