US3154565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromenyl compounds and method of preparing
Assignee: Merck and Co Inc
•
Filing: 1962-03-22
•
Granted: 1964-10-27
•
Expires: 1982-03-22
Abstract
No abstract record available.
Inventors
- 👤 Bruce O Linn
- 👤 Clifford H Shunk
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; C07D311/78; C07D311/92; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/6552; C07F9/65522; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
10 words
THE PROCESS WHICH COMPRISES REACTING A QUINONE OF THE FORMULA
Claim 2
Dependent Claim
10 words
THE PROCESS WHICH COMPRISES REACTING A QUINONE OF THE FORMULA
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 5
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 6
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |