US3152173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basically substituted diphenyl-methane derivatives and process for preparing them
Assignee: Hoechst AG
•
Filing: 1959-05-05
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Granted: 1964-10-06
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Expires: 1979-05-05
Abstract
No abstract record available.
Inventors
- 👤 Ehrhart Gustav
- 👤 Ott Heinrich
- 👤 Lindner Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:46
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
BASICALLY SUBSTITUTED DIPHENYL-METHANE DERIVATIVES OF THE FORMULA
Claim 2
Dependent Claim
7 words
BASICALLY SUBSTITUTED DIPHENYL-METHANE DERIVATIVES OF THE FORMULA
References Cited (Backward Citations)
US2601323A
Cited
US2681934A
Cited
US2797242A
Cited
US2738347A
Cited
US2872374A
Cited
US2894033A
Cited
US2854379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |