Patent US3392418A successfully refreshed from Google Patents.
US3392418A
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US
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Dry foam type carpet shampooing machine
Assignee: Von Schrader Manufacturing Co
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Filing: 1966-08-08
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Granted: 1968-07-16
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Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Lewis G Schowalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:46
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4083; A47L11/32; A47L11/325; A47L11/4002; A47L11/4013; A47L11/4027; A47L11/4036; A47L11/4041; A47L11/4044; A47L11/4052; A47L11/4058; A47L11/4063; A47L11/4069; A47L11/4072; A47L11/4075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE475224C
Cited
US1801135A
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US2910720A
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US2993223A
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US3065489A
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US3258803A
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US3346896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |