US3329689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of chromanols
Assignee: Merck and Co Inc
•
Filing: 1964-06-05
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Granted: 1967-07-04
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Expires: 1984-06-05
Abstract
No abstract record available.
Inventors
- 👤 Folkers Karl
- 👤 Harold W Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:14
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72; C07D311/78; C07D311/92; C11; C11B; C11B5/00; C11B5/0021; C11B5/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PROCESS FOR THE PREPARATION OF CHROMANOLS WHICH COMPRISES REACTING A QUINONE OF THE FORMULA:
Claim 2
Dependent Claim
15 words
A PROCESS FOR THE PREPARATION OF CHROMANOLS WHICH COMPRISES REACTING A QUINONE 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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |