Patent US2837512A successfully refreshed from Google Patents.
US2837512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated cellulose ethers and process of preparing same
Assignee: EIDP Inc
•
Filing: 1954-11-03
•
Granted: 1958-06-03
•
Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Gerald J Mantell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C08B11/15
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A CELLULOSE ETHER OF THE GENERAL TYPE
Claim 2
Dependent Claim
7 words
A CELLULOSE ETHER OF THE GENERAL TYPE
Claim 3
Dependent Claim
19 words
A PROCESS FOR THE PREPRATION OF CELLULOSE ETHERS WHICH COMPRISES REACTING CELLULOSE WITH AN AMIDE HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
19 words
A PROCESS FOR THE PREPRATION OF CELLULOSE ETHERS WHICH COMPRISES REACTING CELLULOSE WITH AN AMIDE HAVING THE GENERAL FORMULA
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |