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Patent US2533298A successfully refreshed from Google Patents.
US2533298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venetian blind
Assignee: CALNETIAN BLINDS Inc
•
Filing: 1946-02-16
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Granted: 1950-12-12
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Expires: 1966-02-16
Abstract
No abstract record available.
Inventors
- 👤 Charles D Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/303; E06B9/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2043501A
Cited
US2317659A
Cited
US2317660A
Cited
US2379353A
Cited
US2381060A
Cited
US2405579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |