Patent US2829391A successfully refreshed from Google Patents.
US2829391A
Expired / Lapsed
US
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Power driven cleaning machine having fluid control system
Assignee: Tennant Co
•
Filing: 1953-05-07
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Granted: 1958-04-08
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Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Albert S Swanson
- 👤 Ralph C Peabody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:38
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/02; E01H1/04; E01H1/047; E01H1/08; E01H1/0827; E01H1/0854
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2317680A
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US2611249A
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US2608823A
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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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |