Patent US2541967A successfully refreshed from Google Patents.
US2541967A
Expired / Lapsed
US
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N-substituted 2-amino-indanes
Assignee: Pharmacia and Upjohn Co
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Filing: 1944-09-05
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Granted: 1951-02-13
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Expires: 1964-09-05
Abstract
No abstract record available.
Inventors
- 👤 Harold G Kolloff
- 👤 Levin Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:25
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/50; C07D317/58; C07C; C07C211/00; C07C211/33; C07C211/39; C07C211/41; C07C211/42; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND OF THE GROUP CONSISTING OF (A) N-SUBSTITUTED 2-AMINO-INDANES HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
A COMPOUND OF THE GROUP CONSISTING OF (A) N-SUBSTITUTED 2-AMINO-INDANES HAVING THE 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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |