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US3105094A
Expired / Lapsed
US
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5, 5'-di-tert-alkyl substituted 2, 2', 4, 4'-tetrahydroxybenzophenones
Assignee: EIDP Inc
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Filing: 1960-10-03
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Granted: 1963-09-24
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Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 Guenther K Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/69; C07C49/00; C07C49/76; C07C49/82; C07C49/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
References Cited (Backward Citations)
US2789140A
Cited
FR1220656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |