US2653108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose ether composition
Assignee: Hercules Powder Co
•
Filing: 1950-12-29
•
Granted: 1953-09-22
•
Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Oakley Norman Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A COMPOSITION OF MATTER COMPRISING CARBOXYMETHYL HYDROXYETHYL CELLULOSE HAVING A DEGREE OF SUBSTITUTION FROM ABOUT 0.37 TO NOT MORE THAN 0.5 CARBOXMETHYL GROUP PER ANHYDROGLUCOSE UNIT AND DIPROPYLENE GLLYCOL IN AN AMOUNT FROM 10% TO 40% BY WEIGHT AS A PLASTICIZER THEREFOR.
Claim 2
Dependent Claim
42 words
A COMPOSITION OF MATTER COMPRISING CARBOXYMETHYL HYDROXYETHYL CELLULOSE HAVING A DEGREE OF SUBSTITUTION FROM ABOUT 0.37 TO NOT MORE THAN 0.5 CARBOXMETHYL GROUP PER ANHYDROGLUCOSE UNIT AND DIPROPYLENE GLLYCOL IN AN AMOUNT FROM 10% TO 40% BY WEIGHT AS A PLASTICIZER THEREFOR.
References Cited (Backward Citations)
US2265918A
Cited
US2135128A
Cited
US2235798A
Cited
US2476331A
Cited
US2465915A
Cited
US2550622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |