US3879443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sun-screening compounds III
Assignee: ISP Investments LLC
•
Filing: 1974-04-29
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Granted: 1975-04-22
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Expires: 1994-04-29
Abstract
Abstract Sun-screening compounds, useful to protect the skin and hair against deleterious effects upon exposure to ultraviolet radiation, of the formula: WHERE R'' is R'''' is R1, R2, R3, R4 and R5 are independently lower alkyl and Y is a C2-C6 alkylene. Sun-screening compositions containing such compounds and a cosmetically acceptable diluent or carrier, and methods of using such compositions, are also disclosed.
Inventors
- 👤 Albert Frederick Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
A; A61; A61Q; A61Q17/00; A61Q17/04; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/445
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
5 words
A compound of the formula:
Claim 4
Dependent Claim
5 words
A compound of the formula:
Claim 5
Dependent Claim
26 words
The compound according to claim 1, wherein R1, R2, R3, R4 and R5 are independently straight or branched chain alkyl of 1 to 3 carbon atoms.
Claim 6
Dependent Claim
8 words
The compound accOrding to claim 1, which is
Claim 7
Dependent Claim
8 words
The compound according to claim 1, which is
Claim 8
Dependent Claim
8 words
The compound according to claim 1, which is
Claim 9
Dependent Claim
8 words
The compound according to claim 1, which is
References Cited (Backward Citations)
US3536723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |