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Patent US3041644A successfully refreshed from Google Patents.
US3041644A
Expired / Lapsed
US
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Rug shampooing machine
Assignee: AMERICAN WATERLOCK Corp
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Filing: 1959-12-09
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Granted: 1962-07-03
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Expires: 1979-12-09
Abstract
No abstract record available.
Inventors
- 👤 William P Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4088; A47L11/32; A47L11/325; A47L11/4036; A47L11/4041; A47L11/4063; A47L11/4069; A47L11/4072; A47L11/4083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |