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US2896243A
Expired / Lapsed
US
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Venetian blind slat-cleaning device
Assignee: Individual
•
Filing: 1956-12-31
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Granted: 1959-07-28
•
Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Milton H Schoenfield
- 👤 Donald B Schoenfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:44
CPC Classifications
A; A47; A47L; A47L4/00; A47L4/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2622256A
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US2650384A
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US2761167A
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US2759211A
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US2790192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |