Patent US3862211A successfully refreshed from Google Patents.
US3862211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet light and heat stabilizers
Assignee: KONINKL IND MIJ
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Filing: 1970-09-21
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Granted: 1975-01-21
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Expires: 1990-09-21
Abstract
Abstract Compounds are disclosed having the general formula: WHEREIN Z represents a sulfonyl group, an alkylidene group or a cycloalkylidene group having from three to eight carbon atoms, n being 1 or 2 and, when n 1, R is an Alpha , Beta -unsaturated alkyl group having from two to four carbon atoms, a nonsubstituted phenyl group, or a substituted phenyl group having a substituent selected from an alkyl group having from one to six carbon atoms, an alkoxy group having from one to four carbon atoms, a halogen atom, or an amino, N-substituted amino, nitro, aryloxy or cyano group and, when n 2, R is phenylene. They are useful as ultraviolet light and heat stabilizers for polyvinyl chloride and the like.
Inventors
- 👤 Reginoldus Havinga
- 👤 Pieter Dirk Swaters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:07
CPC Classifications
C; C07; C07C; C07C317/00; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/105; C08K5/107; C08K5/36; C08K5/41
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
11 words
A compound as defined in claim 1, said compound being 2-(4-hydroxyphenyl)-2-(4-benzoyloxyphenyl)propane.
Claim 2
Dependent Claim
11 words
A compound as defined in claim 1, said compound being 2-methyl-4-(4-hydroxyphenyl)-4-(4-benzoyloxyphenyl)pentane.
Claim 3
Dependent Claim
11 words
A compound as defined in claim 1, said compound being 2-(4-hydroxyphenyl)-2-(4-(tert.butylbenzoyloxy)phenyl)propane.
Claim 4
Dependent Claim
12 words
A compound as defined in claim 1, said compound being 2-(4-hydroxyphenyl)-2-(4-(4)chlorobenzoyloxy)-phenyl) propane.
Claim 5
Dependent Claim
11 words
A compound as defined in claim 1, said compound being 2-(4-hydroxyphenyl)-2-(4-(3-isopropylbenzoyloxy)phenyl)propane.
References Cited (Backward Citations)
US3579561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |