Patent US2921628A successfully refreshed from Google Patents.
US2921628A
Expired / Lapsed
US
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Blind having relatively adjustable slats
Assignee: Individual
•
Filing: 1957-04-09
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Granted: 1960-01-19
•
Expires: 1977-04-09
Abstract
No abstract record available.
Inventors
- 👤 Alvarez Alfonso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:34
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/02; E06B9/08; E06B9/11; E06B9/15; E06B9/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191202045A
Cited
GB322457A
Cited
US1912817A
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US1966728A
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US2165292A
Cited
US2187458A
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US2118134A
Cited
US2318525A
Cited
US2315605A
Cited
US2551736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |