Patent US3545998A successfully refreshed from Google Patents.
US3545998A
Expired / Lapsed
US
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Lower aliphatic alcohol treatment of light polarizing film
Assignee: Polaroid Corp
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Filing: 1968-03-28
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Granted: 1970-12-08
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Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 Harold O Buzzell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:00
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/65118; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; D06P3/00; D06P3/58; C08J2301/00; C08J2301/02; C08J2429/00; C08J2429/02; C08J2429/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2394688A
Cited
US2563469A
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US2606835A
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US2636420A
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US2892382A
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US2892383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |