US2692284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing ketimines
Assignee: Shell Development Co
•
Filing: 1952-11-28
•
Granted: 1954-10-19
•
Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Vernon E Haury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:06
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/02; C07C251/04; C07C251/06; C07C251/08; C10; C10M; C10M2207/00; C10M2207/28; C10M2207/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A PROCESS WHICH COMPRISES HEATING A KETIMINE OF THE FORMULA
Claim 2
Dependent Claim
10 words
A PROCESS WHICH COMPRISES HEATING A KETIMINE OF THE FORMULA
References Cited (Backward Citations)
US2418173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |