US2512960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New cellulose derivatives
Assignee: EIDP Inc
•
Filing: 1947-09-16
•
Granted: 1950-06-27
•
Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Paul W Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/14; C08B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
HYDROXYETHYL CELLULOSE ACETATE CHLORACETATE.
Claim 2
Dependent Claim
4 words
HYDROXYETHYL CELLULOSE ACETATE CHLORACETATE.
References Cited (Backward Citations)
GB318908A
Cited
GB358510A
Cited
GB368271A
Cited
US1994038A
Cited
GB372122A
Cited
US1969468A
Cited
US2100369A
Cited
US2327397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |