US2716770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window cleaning appliance
Assignee: Individual
•
Filing: 1950-05-27
•
Granted: 1955-09-06
•
Expires: 1970-05-27
Abstract
No abstract record available.
Inventors
- 👤 Clarence H Caldwel
- 👤 Walter K Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:01
CPC Classifications
A; A47; A47L; A47L1/00; A47L1/06; A47L1/09; A47L1/095
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US591745A
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US359288A
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US736989A
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US1812207A
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US1726741A
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US1843899A
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US1929882A
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US1783506A
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US1982345A
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US1975585A
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US2270579A
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US2285412A
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US2419720A
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US2579625A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |