Patent US2998765A successfully refreshed from Google Patents.
US2998765A
Expired / Lapsed
US
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Pivotal louver assembly
Assignee: Individual
•
Filing: 1958-07-02
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Granted: 1961-09-05
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Expires: 1978-07-02
Abstract
No abstract record available.
Inventors
- 👤 Spargo John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:11
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US262929A
Cited
US802000A
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US1238703A
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US2040049A
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US2311122A
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US2349544A
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US2496921A
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US2579099A
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US2736403A
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US2790373A
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US2812836A
Cited
US2826282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |