US3178420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-2-hydroxy-1-propoxy benzal derivatives of fluorene and xanthene
Assignee: Richardson Vicks Inc
•
Filing: 1959-06-25
•
Granted: 1965-04-13
•
Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frank P Palopoli
- 👤 Albert A Carr
- 👤 Vernon J Feil
- 👤 Geraldine L Krueger
- 👤 William L Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:07
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D211/00; C07D211/04; C07D211/68; C07D211/70; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2643259A
Cited
US2742463A
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US2183237A
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US2520093A
Cited
US2523177A
Cited
US2820797A
Cited
US2773900A
Cited
US2891957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |