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Patent US1806237A successfully refreshed from Google Patents.
US1806237A
Expired / Lapsed
US
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Carpet cleaning machine
Assignee: CHASE MACHINE Co
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Filing: 1925-03-02
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Granted: 1931-05-19
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Expires: 1945-03-02
Abstract
No abstract record available.
Inventors
- 👤 Chase Stephen
- 👤 George H Palm
- 👤 Rudolf S Pfeiffer
- 👤 Benjamin S Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:46
CPC Classifications
D; D06; D06G; D06G1/00
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) | 1934-05-18 | 1934-11-17 | 1935-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-18 | 1938-11-17 | 1939-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-18 | 1942-11-17 | 1943-05-19 | $7700.00 | Window Closed / Lapsed |