US4256664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substantive sunscreen agents
Assignee: Colgate Palmolive Co
•
Filing: 1976-03-01
•
Granted: 1981-03-17
•
Expires: 1996-03-01
Abstract
Abstract Substantive sunscreen agents which are neutralized or quaternary ammonium salts of esters or amides of p-aminobenzoic acid, p-nitrobenzoic acid or salicylic acid with choline, lecithin, hydroxyalkyl-substituted imidazoles, 2,2-dialkylamino alkanols or alkylamines, pyridinesulfonamide, or colaminomethylformyl chloride; or omega halogenoalkylethers of salicylic acid quaternized with tertiary amines.
Inventors
- 👤 Morton B. Epstein
- 👤 John F. Gerecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:30
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/445; A61K8/49; A61K8/494; A61K8/4946
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A substantive sunscreening compound of the formula ##STR9## wherein: R 1 is H or OH; R 3 is NH 2 or NO 2 when R 1 is H and H when R 1 is OH; R 6 and R 7 are each C 1-5 alkyl groups; R 8 is C 8-18 alkyl; n is an integer from 2 to 12; and Hal is Cl or Br
Claim 2
Dependent Claim
66 words
A substantive sunscreening compound of the formula ##STR9## wherein: R 1 is H or OH; R 3 is NH 2 or NO 2 when R 1 is H and H when R 1 is OH; R 6 and R 7 are each C 1-5 alkyl groups; R 8 is C 8-18 alkyl; n is an integer from 2 to 12; and Hal is Cl or Br
Claim 3
Dependent Claim
11 words
A compound according to claim 1 wherein R 1 is OH.
Claim 4
Dependent Claim
20 words
A compound according to claim 2 wherein R 6 and R 7 are each CH 3 an n is 3.
Claim 5
Dependent Claim
11 words
A compound according to claim 3 wherein R 8 is dodecyl.
References Cited (Backward Citations)
US1358750A
Cited
US1676470A
Cited
US1513730A
Cited
US1596259A
Cited
US2175782A
Cited
US2313016A
Cited
US2617824A
Cited
US2668100A
Cited
US2816080A
Cited
US2935525A
Cited
US2944061A
Cited
US3002886A
Cited
GB862721A
Cited
US3069321A
Cited
US3141035A
Cited
CH399486A
Cited
US3506758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |