US4029684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-Hydroxybenzophenone derivatives
Assignee: Sandoz AG
•
Filing: 1975-05-16
•
Granted: 1977-06-14
•
Expires: 1995-05-16
Abstract
Abstract The present invention concerns novel 2-hydroxybenzophenone derivatives and metal complexes thereof of the formula: ##STR1## wherein Z 1 , Z 2 , Y 1 and Y 2 are each, independently, hydrogen or a substituent, at least one of Y 1 and Y 2 being a group ##STR2## wherein, R 1 is alkyl R 2 is hydrogen or a substituent and A is oxygen, sulphur or ##STR3## The compounds are useful for stabilizing organic material, e.g. plastics, against degradation under the influence of U.V. radiation.
Inventors
- 👤 Lajos Avar
- 👤 Kurt Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:00
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C07; C07C; C07C317/00; C07C317/24; C09K15/12; C09K15/14; C09K15/20; C09K15/22; C09K15/32; C09K15/326
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A compound of the formula: ##STR43## wherein Y iv is hydrogen, fluorine, chlorine, bromine or alkyl of 1 to 9 carbon atoms, R 1 iv is tertiary butyl, R 2 iv is tertiary alkyl of 4 to 9 carbon atoms, and M is hydrogen, an alkali metal or one equivalent of divalent nickel, zinc, manganese, copper, cobalt, lead, titanium or calcium.
Claim 2
Dependent Claim
61 words
A compound of the formula: ##STR43## wherein Y iv is hydrogen, fluorine, chlorine, bromine or alkyl of 1 to 9 carbon atoms, R 1 iv is tertiary butyl, R 2 iv is tertiary alkyl of 4 to 9 carbon atoms, and M is hydrogen, an alkali metal or one equivalent of divalent nickel, zinc, manganese, copper, cobalt, lead, titanium or calcium.
Claim 3
Dependent Claim
24 words
A compound according to claim 1 wherein M is hydrogen or one equivalent of divalent nickel, zinc, manganese, copper, cobalt, lead, titanium or calcium.
Claim 4
Dependent Claim
10 words
A compound of claim 1, in alkali metal salt form.
Claim 5
Dependent Claim
9 words
A compound of claim 3, in sodium salt form.
Claim 6
Dependent Claim
9 words
The compound of claim 2, of the formula: ##STR44##
Claim 7
Dependent Claim
9 words
The compound of claim 2, of the formula: ##STR45##
Claim 8
Dependent Claim
9 words
The compound of claim 2, of the formula: ##STR46##
Claim 9
Dependent Claim
9 words
The compound of claim 2, of the formula: ##STR47##
Claim 10
Dependent Claim
10 words
A compound of claim 1, in divalent nickel complex form.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |