US3085087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of carboxyalkyl cellulose ethers
Assignee: Hercules Powder Co
•
Filing: 1956-09-13
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Granted: 1963-04-09
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Expires: 1976-09-13
Abstract
No abstract record available.
Inventors
- 👤 John E Henry
- 👤 George A Reasor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:09
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/10; C08B11/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1884629A
Cited
US2096681A
Cited
US2181264A
Cited
GB526370A
Cited
US2517577A
Cited
US2524024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-08 | 1966-10-08 | 1967-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-08 | 1970-10-08 | 1971-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-08 | 1974-10-08 | 1975-04-09 | $7700.00 | Window Closed / Lapsed |