Patent US2397472A successfully refreshed from Google Patents.
US1661979A
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Electrical scrubbing and drying machine
Assignee: Individual
•
Filing: 1924-08-20
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Granted: 1928-03-06
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Expires: 1944-08-20
Abstract
No abstract record available.
Inventors
- 👤 Ugolini Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4083; A47L11/29; A47L11/292; A47L11/4013; A47L11/4016; A47L11/4025; A47L11/4036; A47L11/4041; A47L11/4052; A47L11/4055; A47L11/4063; A47L11/4069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-03-06 | 1931-09-05 | 1932-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-03-06 | 1935-09-05 | 1936-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-03-06 | 1939-09-05 | 1940-03-06 | $7700.00 | Window Closed / Lapsed |