Patent US2759534A successfully refreshed from Google Patents.
US2759534A
Expired / Lapsed
US
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Vertical slat venetian blind
Assignee: Individual
•
Filing: 1953-05-25
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Granted: 1956-08-21
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Expires: 1973-05-25
Abstract
No abstract record available.
Inventors
- 👤 Walter A Harju
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/36; E06B9/368; E06B9/367; Y; Y10; Y10S; Y10S160/00; Y10S160/90; Y10S160/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2139781A
Cited
US2158454A
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US2135647A
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US2188575A
Cited
US2503441A
Cited
US2625219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |