Patent US3387035A successfully refreshed from Google Patents.
US3387035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine substituted benzophenone ultraveiolet absorbers
Assignee: United States Department of the Air Force
•
Filing: 1963-11-04
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Granted: 1968-06-04
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 Gray Don Norman
- 👤 Knight Roger Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/82; C07C49/83; C07C49/835; C07C49/84; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
THE COMPOUND 2''-TRIFLUOROMETHYL-2-HYDROXY-4-METHOXYBENZOPHENONE.
Claim 2
Dependent Claim
3 words
THE COMPOUND 2''-TRIFLUOROMETHYL-2-HYDROXY-4-METHOXYBENZOPHENONE.
References Cited (Backward Citations)
US2773903A
Cited
US2872421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |