US2946797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-aminotetrahydroisoquinolinium salts
Assignee: WR Grace and Co
•
Filing: 1958-08-18
•
Granted: 1960-07-26
•
Expires: 1978-08-18
Abstract
No abstract record available.
Inventors
- 👤 Rudner Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:20
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/12; C07D217/18; C07D217/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
NEW CHEMICAL 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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |