US2562978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch carbamates
Assignee: Individual
•
Filing: 1947-11-25
•
Granted: 1951-08-07
•
Expires: 1967-11-25
Abstract
No abstract record available.
Inventors
- 👤 Ivan A Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:54
CPC Classifications
C; C08; C08B; C08B31/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A STARCH CARBAMATE POWDER CONTAINING AT LEAST ONE CARBAMYL GROUP FOR EVERY 14 ANHYDROGLUCOSE UNITS, CHARACTERIZED IN THAT IT IS SUBSTANTIALLY NON-SWELLING OR PASTE-FORMING IN HOT WATER AND IN THAT AN AQUEOUS SUSPENSION THEREOF HAS A PH OF ABOUT FROM 6.4 TO 7.6
Claim 2
Dependent Claim
43 words
A STARCH CARBAMATE POWDER CONTAINING AT LEAST ONE CARBAMYL GROUP FOR EVERY 14 ANHYDROGLUCOSE UNITS, CHARACTERIZED IN THAT IT IS SUBSTANTIALLY NON-SWELLING OR PASTE-FORMING IN HOT WATER AND IN THAT AN AQUEOUS SUSPENSION THEREOF HAS A PH OF ABOUT FROM 6.4 TO 7.6
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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |