US2921955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonate derivatives of ethanolamines
Assignee: Texaco Inc
•
Filing: 1956-12-11
•
Granted: 1960-01-19
•
Expires: 1976-12-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Newman
- 👤 Robert Y Heisler
- 👤 Alpert Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C07; C07C; C07C271/00; C07C271/06; C07C271/08; C07C271/10; C07C271/16; C10L1/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
CARBONATE DERIVATIVES OF ETHANOLAMINES HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
CARBONATE DERIVATIVES OF ETHANOLAMINES HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2568608A
Cited
US2684381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |