Patent US2545874A successfully refreshed from Google Patents.
US2545874A
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Mechanical unit for adjustable louvers
Assignee: CLETUS A LADIG
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Filing: 1947-09-15
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Granted: 1951-03-20
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Expires: 1967-09-15
Abstract
No abstract record available.
Inventors
- 👤 Brothers William Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:32
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US175236A
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US182075A
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US425542A
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US1014679A
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US1496055A
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US1830487A
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US2164814A
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US2228439A
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US2272722A
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US2331823A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |