Patent US3176020A successfully refreshed from Google Patents.
US3176020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indazolium derivatives
Assignee: Kuhlmann SA
•
Filing: 1963-01-11
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Granted: 1965-03-30
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Expires: 1983-01-11
Abstract
No abstract record available.
Inventors
- 👤 Sureau Robert Frederic Michel
- 👤 Mingasson Georges Raymon Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:52
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/54; C07D231/56; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B44/00; C09B44/10; C09B44/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COLORLESS COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
6 words
A COLORLESS 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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |