US2923691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reacting protein with isocy-
Assignee: —
•
Filing: —
•
Granted: 1960-02-02
•
Expires: 1977-02-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:35
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08H; C08H1/00; C08H1/06; C08L; C08L89/00; C09; C09J; C09J189/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROTEINYL UREA-ALDEHYDE COPOLYMER PREPARED BY REACTING FROM ABOUT .1% TO ABOUT 1.2% OF AN ALDEHYDE, BASED ON THE WEIGHT OF THE PROTEIN SOLIDS, WITH A PROTEINYL UREA AT A PH OF AT LEAST ABOUT 5, SAID PROTEINYL UREA BEING FORMED BY TREATING A PROTEIN WITH ISOCYANIC ACID WHEREBY THE FREE AMINO GROUPS OF SAID PROTEIN ARE CONVERTED TO FREE CARBAMIDO GROUPS.
Claim 2
Dependent Claim
62 words
A PROTEINYL UREA-ALDEHYDE COPOLYMER PREPARED BY REACTING FROM ABOUT .1% TO ABOUT 1.2% OF AN ALDEHYDE, BASED ON THE WEIGHT OF THE PROTEIN SOLIDS, WITH A PROTEINYL UREA AT A PH OF AT LEAST ABOUT 5, SAID PROTEINYL UREA BEING FORMED BY TREATING A PROTEIN WITH ISOCYANIC ACID WHEREBY THE FREE AMINO GROUPS OF SAID PROTEIN ARE CONVERTED TO FREE CARBAMIDO GROUPS.
References Cited (Backward Citations)
US1964960A
Cited
GB512038A
Cited
US2332519A
Cited
US2381063A
Cited
US2512672A
Cited
US2606123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |