Patent US3039931A successfully refreshed from Google Patents.
US2860131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzimidazole derivatives
Assignee: Merck and Co Inc
•
Filing: 1953-05-05
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Granted: 1958-11-11
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Expires: 1973-05-05
Abstract
No abstract record available.
Inventors
- 👤 Folkers Karl
- 👤 Shunk Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:37
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2065418A
Cited
US2409685A
Cited
US2522854A
Cited
US2662883A
Cited
US2606187A
Cited
US2719843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |