US3008952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose esters containing the sulfonate group
Assignee: Eastman Kodak Co
•
Filing: 1960-02-01
•
Granted: 1961-11-14
•
Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 George P Touey
- 👤 John E Kiefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:53
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
CELLULOSE ESTERS HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
6 words
CELLULOSE ESTERS HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2036423A
Cited
US2241235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |