Patent US2444758A successfully refreshed from Google Patents.
US2444758A
Expired / Lapsed
US
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Cleaning implement
Assignee: Individual
•
Filing: 1947-12-11
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Granted: 1948-07-06
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Expires: 1967-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jan H Stillbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:45
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/20; A47L13/24; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17888; Y10T403/00; Y10T403/70; Y10T403/7005; Y10T403/7007; Y10T403/7075; Y10T403/7077; Y10T403/7079
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US921840A
Cited
US931327A
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US1418184A
Cited
US1420639A
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US1505318A
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US1494859A
Cited
FR691732A
Cited
US1932099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |