Patent US2513487A successfully refreshed from Google Patents.
US2513487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(aminoalkyl)-1, 2, 3, 4-tetrahydrofluoranthenes and their production
Assignee: CIBA PHARM PROD Inc
•
Filing: 1946-12-10
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Granted: 1950-07-04
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Expires: 1966-12-10
Abstract
No abstract record available.
Inventors
- 👤 Hoffmann Karl
- 👤 Tagmann Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:58
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/18; C07D211/20; C07D211/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
THE 1,2,3,4-TETRAHYDROFLUORANTHENES WHICH BEAR IN THE 1-POSITION A GROUPING SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
15 words
THE 1,2,3,4-TETRAHYDROFLUORANTHENES WHICH BEAR IN THE 1-POSITION A GROUPING SELECTED FROM THE CLASS CONSISTING OF
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) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |