US3074998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enol carbamates
Assignee: Shell USA Inc
•
Filing: 1959-12-10
•
Granted: 1963-01-22
•
Expires: 1979-12-10
Abstract
No abstract record available.
Inventors
- 👤 Richard R Whetstone
- 👤 Jerome G Kuderna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:45
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
AS A NEW COMPOUND, THE ESTER OF A CARBAMIC ACID CHARACTERIZED BY THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2592890A
Cited
DE1054987B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |