Patent US2680480A successfully refreshed from Google Patents.
US2680480A
Expired / Lapsed
US
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Vertical slat venetian blind
Assignee: Individual
•
Filing: 1950-12-06
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Granted: 1954-06-08
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Walter A Harju
- 👤 William B Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:59
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/36; E06B9/362; E06B9/365; Y; Y10; Y10S; Y10S160/00; Y10S160/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030234A
Cited
US2158454A
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US2135647A
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US2422407A
Cited
US2529714A
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US2556942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |