Patent US2672638A successfully refreshed from Google Patents.
US2672638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window washer and wiper
Assignee: Individual
•
Filing: 1950-11-30
•
Granted: 1954-03-23
•
Expires: 1970-11-30
Abstract
No abstract record available.
Inventors
- 👤 Blum Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:35
CPC Classifications
A; A47; A47L; A47L1/00; A47L1/06; A47L1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1358597A
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US1498246A
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FR588908A
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US1632515A
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US1668931A
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US1766529A
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US1818917A
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US2006289A
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US2104161A
Cited
US2188114A
Cited
US2509568A
Cited
US2534086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |