Patent US2526770A successfully refreshed from Google Patents.
US2526770A
Expired / Lapsed
US
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Automatic louver
Assignee: Individual
•
Filing: 1947-09-27
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Granted: 1950-10-24
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Expires: 1967-09-27
Abstract
No abstract record available.
Inventors
- 👤 William A Pledger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:45
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)
US957776A
Cited
GB171946A
Cited
US1601100A
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US1482398A
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US1798041A
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US1956829A
Cited
US1828016A
Cited
US2005615A
Cited
US2113896A
Cited
US2161471A
Cited
US2184110A
Cited
US2284912A
Cited
US2355412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |