Patent US2959117A successfully refreshed from Google Patents.
US2959117A
Expired / Lapsed
US
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Louver assembly
Assignee: Dow Silicones Corp
•
Filing: 1959-01-26
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Granted: 1960-11-08
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jay L Wright
- 👤 Oscar C Melgaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152447A
Cited
US2552982A
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US2612095A
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US2612096A
Cited
GB771784A
Cited
US2874626A
Cited
US2821899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |