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US3798231A
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Bis-aroxazolyl-para-polyphenylenes
Assignee: Sandoz AG
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Filing: 1971-10-05
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Granted: 1974-03-19
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Expires: 1991-10-05
Abstract
Abstract WHICH ARE EXCELLENT BRIGHTENERS FOR POLYOLEFINS, POLYESTER OR POLYAMIDES. 2-((AR1>OXAZOL-2-YL)-(1,4-PHENYLENE)N-)OXAZOLE<AR2 REPRESENT BENZENE OR PHENANTHRENE RADICALS WHICH MAY BE SUBSTITUTED AND, IF THEY ARE BENZENE RADICALS, EACH RADICAL BEARS NOT MORE THAN ONE SECOND-ORDER (META DIRECTING) SUBSTITUTENT, AND, IF N HAS THE VALUE 3 THE MOLECULE CONTAINS AT LEAST ONE-SECOND-ORDER (META-DIRECTING) SUBSTITUENT BOUND TO ONE OF THE BENZENE RADICALS 2-((AR1>OXAZOL-2-YL)-(1,4-PHENYLENE)N-)OXAZOLE<AR2 WHERE THE VALUE OF N IS AT LEAST 3 BUT NOT GREATER THAN 8 AND 2-((AR1>OXAZOL-2-YL)-(1,4-PHENYLENE)N-)OXAZOLE<AR2 BIS-AROXAZOLYL-PARA-POLYPHENYLENES OF THE FORMULA
Inventors
- 👤 F Fleck
- 👤 H Kittl
- 👤 H Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:23
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/54; C07D263/56; C07D263/57; C07D263/62; C07D263/64; C09; C09K; C09K11/00; C09K11/06
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |