Patent US2520629A successfully refreshed from Google Patents.
US2520629A
Expired / Lapsed
US
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Automatically operated venetian blind
Assignee: Individual
•
Filing: 1948-04-22
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Granted: 1950-08-29
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Expires: 1968-04-22
Abstract
No abstract record available.
Inventors
- 👤 Esposito John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:35
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/303; E06B9/304; E06B9/32; E06B9/322; E06B2009/3225; E06B2009/3227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1756680A
Cited
US2029143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |