Patent US1999642A successfully refreshed from Google Patents.
US2947752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
8-aminococainium compounds
Assignee: WR Grace and Co
•
Filing: 1959-02-04
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Granted: 1960-08-02
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Expires: 1979-02-04
Abstract
No abstract record available.
Inventors
- 👤 Rudner Bernard
- 👤 Aristotle G Prapas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:44
CPC Classifications
C; C07; C07D; C07D451/00; C07D451/02; C07D451/04; C07D451/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |