Patent US3471589A successfully refreshed from Google Patents.
US3471589A
Expired / Lapsed
US
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Polyvinyl acetal resins
Assignee: Elantas PDG Inc
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Filing: 1965-05-12
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Granted: 1969-10-07
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Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Maynard J Rinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:49
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6212; C09; C09D; C09D129/00; C09D129/14; C09D161/00; C09D161/04; C09D161/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 0
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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) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |