Patent US2633191A successfully refreshed from Google Patents.
US2633191A
Expired / Lapsed
US
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Blind construction
Assignee: Individual
•
Filing: 1950-06-21
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Granted: 1953-03-31
•
Expires: 1970-06-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Roger A Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:16
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/38; E06B9/386
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US335354A
Cited
US2059134A
Cited
US2110145A
Cited
US2155985A
Cited
US2315605A
Cited
US2395096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |