Patent US2957520A successfully refreshed from Google Patents.
US2957520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venetian blind
Assignee: Individual
•
Filing: 1958-08-04
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Granted: 1960-10-25
•
Expires: 1978-08-04
Abstract
No abstract record available.
Inventors
- 👤 Paul J Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:03
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/28; E06B9/30; E06B9/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1244215A
Cited
US1302093A
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US1708636A
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US1799138A
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US2242923A
Cited
US2188300A
Cited
US2268858A
Cited
GB538932A
Cited
US2389956A
Cited
US2504771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |