US3275684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis[9-(substituted alkyl)-fluoren-9-yl] alkanes
Assignee: Union Carbide Corp
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Filing: 1965-03-08
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Granted: 1966-09-27
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Henry E Fritz
- 👤 David W Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:45
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C07; C07C; C07C57/00; C07C57/46; C07C57/50; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/127; C08G63/13; C08L; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A BIS(9-(CARBOXYALKYL)FLUOREN-9-YL)ALKANE OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A BIS(9-(CARBOXYALKYL)FLUOREN-9-YL)ALKANE OF THE FORMULA:
References Cited (Backward Citations)
US3114768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |