Patent US3795733A successfully refreshed from Google Patents.
US3795733A
Expired / Lapsed
US
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Suntan formulations containing ethylenically unsaturated derivatives of 4-aminobenzoic acid
Assignee: Indopco Inc
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Filing: 1972-03-07
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Granted: 1974-03-05
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Expires: 1992-03-07
Abstract
Abstract ETHYLENICALLY UNSATURATED DERIVATIVES OF 4-AMINOBENZOIC ACUD ARE PREPARED BY A NOVEL METHOD INVOLVING THE REACTION UNDER CONTROLLED CONDITIONS OF 4-AMINOBENZOIC ACID AND VARIOUS DERIVATIVES THEREOF WITH ALLYL CHLORIDE. THE RESULTING MONOMERS MAY, THEREAFTER, BE COPOLYMERIZED WITH A WIDE VARIETY OF CONVENTIONAL ETHYLENICALLY UNSATURATED, I.E. VINYL, MONOMERS. THE MONOMERIC DERIVATIVES AS WELL AS THE COPOLYMERS PREPARED THEREFROM ARE ULTRAVIOLET ABSORBERS IN THE 280-320 MILLIMICRONS RANGE AND FIND A PARTICULAR UTILITY AS A SUN-SCREEN AGENT IN SUNTAN FORMULATIONS.
Inventors
- 👤 M Skoultchi
- 👤 E Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:40
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/445; A61K8/72; A61K8/81; A61K8/817; A61K2800/00; A61K2800/40; A61K2800/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |