US3347694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for optical brightening of polymeric substrates utilizing 2-styryloxazole compounds
Assignee: Mitsui Chemical Industry Co Ltd
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Filing: 1965-10-22
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Granted: 1967-10-17
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Okubo Ichiro
- 👤 Tsujimoto Michihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A METHOD FOR OPTICAL BRIGHTENING OF SOLID POLYMERIC MATERIALS COMPRISING TREATING SAID MATERIALS WITH AN OXAZOLE COMPOUND OF THE FORMULA
Claim 2
Independent Claim
20 words
A METHOD FOR OPTICAL BRIGHTENING OF SOLID POLYMERIC MATERIALS COMPRISING TREATING SAID MATERIALS WITH AN OXAZOLE COMPOUND OF THE FORMULA
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |