Patent US4144186A successfully refreshed from Google Patents.
US2685604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alkali metal monoaliphatically substituted amides
Assignee: Sharples Chemicals Inc
•
Filing: 1951-05-01
•
Granted: 1954-08-03
•
Expires: 1971-05-01
Abstract
No abstract record available.
Inventors
- 👤 David D Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:10
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS FOR THE PREPARATION OF ALKALI METAL MONOALIPHATICALLY SUBSTITUTED AMIDES HAVING THE FORMULA
Claim 2
Dependent Claim
14 words
A PROCESS FOR THE PREPARATION OF ALKALI METAL MONOALIPHATICALLY SUBSTITUTED AMIDES HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |