Patent US3446720A successfully refreshed from Google Patents.
US3864474A
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Sunscreening compositions containing sulfonium salts
Assignee: Colgate Palmolive Co
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Filing: 1971-05-28
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Granted: 1975-02-04
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Expires: 1991-05-28
Abstract
Abstract A highly substantive sulfonium salt sunscreening agent represented by the formula: WHEREIN A is a sunscreening moiety, having a prominent spectral absorption peak within the range of 250-400 millimicrons; R represents alkylene of from 2 to 18 carbon atoms; R'' and R'''' represent alkyl, and wherein the sum of the carbon atoms in R'' and R'''' is not less than 9 and not greater than 27, and wherein the nitrogen is linked to A as a carboxamido or sulfonamido group, and X is an anion, as well as thioethers and mercaptans useful in preparing same; and compositions containing said agent in a carrier.
Inventors
- 👤 John Fred Gerecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:26
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A SUNSCREENING COMPOSITION COMPRISING FROM 0.1 PERCENT TO 25 PERCENT BY WEIGHT OF 3-PARANITROBENZAMIDOPROPYLDODECYLMETHYL SULFONIUM BROMIDE AS A SKIN-SUBSTANTIVE SUNSCREENING AGENT HAVING A PROMINENT SPECTRAL ABSORPTION PEAK WITHIN THE RANGE OF 250-400 MILLIMICRONS AND A SKINCOMPATIBLE, NON-TOXIC CARRIER WHICH IS COMPATIBLE WITH SAID AGENT.
Claim 2
Dependent Claim
44 words
A SUNSCREENING COMPOSITION COMPRISING FROM 0.1 PERCENT TO 25 PERCENT BY WEIGHT OF 3-PARANITROBENZAMIDOPROPYLDODECYLMETHYL SULFONIUM BROMIDE AS A SKIN-SUBSTANTIVE SUNSCREENING AGENT HAVING A PROMINENT SPECTRAL ABSORPTION PEAK WITHIN THE RANGE OF 250-400 MILLIMICRONS AND A SKINCOMPATIBLE, NON-TOXIC CARRIER WHICH IS COMPATIBLE WITH SAID AGENT.
Claim 3
Dependent Claim
44 words
A sunscreening composition comprising from 0.1 percent to 25 percent by weight of 3-paranitrobenzamido-propyloctylmethyl sulfonium bromide as a skin-substantive sunscreening agent having a prominent spectral absorption peak within the range of 250-400 millimicrons and a skin-compatible, non-toxic carrier which is compatible with said agent.
Claim 4
Dependent Claim
44 words
A sunscreening composition comprising from 0.1 percent to 25 percent by weight of 3-paranitrobenzamido-propyloctylmethyl sulfonium bromide as a skin-substantive sunscreening agent having a prominent spectral absorption peak within the range of 250-400 millimicrons and a skin-compatible, non-toxic carrier which is compatible with said agent.
References Cited (Backward Citations)
US3318953A
Cited
US3506758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |