Patent US2846936A successfully refreshed from Google Patents.
US2846936A
Expired / Lapsed
US
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Window ventilator construction
Assignee: General Electric Co
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Filing: 1955-06-13
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Granted: 1958-08-12
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Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 William M Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:47
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F24; F24F; F24F13/00; F24F13/08; F24F13/18; F24F7/00; F24F7/007; F24F7/013
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US353171A
Cited
US1086317A
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US1234925A
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US1784234A
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US1988810A
Cited
US2021684A
Cited
US2658441A
Cited
US2715495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |