US3475404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing proteinaceous material which comprises heating an aqueous solution of collagencontaining material at a temperature in the range of 250 f.-350 f. and then treating the solution with anion exchange resins
Assignee: INOLEX CHEMICAL Co
•
Filing: 1966-08-25
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Granted: 1969-10-28
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Johnsen
- 👤 Eugene V Matern
- 👤 Raymond S Burnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/78; A; A23; A23J; A23J1/00; A23J1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2351718A
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US3108995A
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US2928822A
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US3234199A
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US3176001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |