Patent US3634320A successfully refreshed from Google Patents.
US3634320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of organic substances against uv radiation
Assignee: Bayer AG
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Filing: 1969-09-24
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Granted: 1972-01-11
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Expires: 1989-09-24
Abstract
Abstract THE USE OF COMPOUNDS OF THE FORMULA BIS((R-OOC-)2-C=CH-)BENZENE IN WHICH R STANDS FOR AN OPTIONALLY SUBSTITUTED ALKYL, CYCLOALKYL, ARALKYL OR ARYL RADICAL, AND THE RING A MAY CONTAIN FURTHER SUBSTITUENTS, FOR THE PROTECTION OF ORGANIC MATERIALS AGAINST THE EFFECT OF UV RAYS.
Inventors
- 👤 Wolfgang Metzner
- 👤 Gunter Peilstocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C09; C09K; C09K15/00; C09K15/04; C09K15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |