US3426069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis(9-(substituted alkyl)fluoren-9-yl)alkanes
Assignee: Union Carbide Corp
•
Filing: 1967-09-11
•
Granted: 1969-02-04
•
Expires: 1987-09-11
Abstract
No abstract record available.
Inventors
- 👤 Henry E Fritz
- 👤 David W Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:25
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/34; C07C233/35; C07C233/40; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2560939A
Cited
US2578736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |