US2766263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New biologically active polycondensed triarylmethane derivatives and a process for their preparation
Assignee: Pharmacia Animal Health Inc
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Filing: 1953-03-02
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Granted: 1956-10-09
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Hahn Ladislaus Arthur
- 👤 Frank Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:20
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A POLYCONDENSED TRIARYLMETHANE DERIVATIVE PREPARED BY CONDENSING A POLYCONDENSED DIARYLMETHANE COMPOUND, WHICH IS A PRODUCT OF THE CONDENSATION OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
24 words
A POLYCONDENSED TRIARYLMETHANE DERIVATIVE PREPARED BY CONDENSING A POLYCONDENSED DIARYLMETHANE COMPOUND, WHICH IS A PRODUCT OF THE CONDENSATION OF A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US1707181A
Cited
US1906890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |