US3676471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-(betahydroxyethoxy-2-hydroxy-benzophenones) and esters thereof
Assignee: Deutsche Advance Produktion GmbH
•
Filing: 1968-10-28
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Granted: 1972-07-11
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Expires: 1988-10-28
Abstract
Abstract Compounds of the formula WHEREIN R is hydrogen, alkyl or aryl and R'' is hydrocarbyl acyloxy, said compounds being useful for light-stabilization of polymeric compositions.
Inventors
- 👤 Heinz Eggensperger
- 👤 Volker Franzen
- 👤 Wilfried Kloss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:34
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C07; C07C; C07C255/00; C07C49/00; C07C49/76; C07C49/84; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
The compound of claim 1 wherein R is phenyl and R'' is decanoyloxy.
Claim 2
Dependent Claim
13 words
The compound of claim 1 wherein R is hydrogen and R'' is cinnamoyloxy.
Claim 3
Dependent Claim
13 words
The compound of claim 1 wherein R is hydrogen and R'' is 4-phenylbenzoyloxy.
Claim 4
Dependent Claim
13 words
The compound of claim 1 wherein R is hydrogen and R'' is benzoyloxy.
Claim 5
Dependent Claim
13 words
The compound of claim 1 wherein R is methyl and R'' is stearoyloxy.
Claim 6
Dependent Claim
15 words
The compound as claimed in claim 1 wherein R is hydrogen and R'' is (-OOC-C*C-COO-)1/2.
Claim 7
Dependent Claim
13 words
The compound of the formula wherein R is phenyl and R'' is propionyloxy.
References Cited (Backward Citations)
US2448767A
Cited
US2675367A
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US2980647A
Cited
US3086988A
Cited
US3341493A
Cited
US3322817A
Cited
US3202716A
Cited
US3313866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |