Patent US2870472A successfully refreshed from Google Patents.
US2870472A
Expired / Lapsed
US
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Cleaning implements
Assignee: Individual
•
Filing: 1956-08-22
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Granted: 1959-01-27
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Albert E Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:48
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/20; A47L13/24; A47L13/25; A47L17/00; A47L17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE503279A
Cited
US373747A
Cited
US1148560A
Cited
US1131348A
Cited
GB161410A
Cited
US1795651A
Cited
US1819800A
Cited
US2225101A
Cited
US2789305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |