US2835676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma-keto-tertiary amines and derivatives thereof
Assignee: Merck and Co Inc
•
Filing: 1953-07-14
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Granted: 1958-05-20
•
Expires: 1973-07-14
Abstract
No abstract record available.
Inventors
- 👤 James M Sprague
- 👤 Everett M Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:34
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/10; C07D295/104; C07D295/108
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND CHOSEN FROM THE CLASS CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
12 words
A COMPOUND CHOSEN FROM THE CLASS CONSISTING OF COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
FR372212A
Cited
US2550745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |