US3220043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self propelled floor treating machine
Assignee: Electrolux Corp
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Filing: 1962-03-19
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Granted: 1965-11-30
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Robert C Lampe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:13
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PROPELLED FLOOR TREATING MACHINE, A BASE MEMBER, ANTI-FRICTION SUPPORT MEANS FOR SUPPORTING AT LEAST A PORTION OF THE WEIGHT OF SAID BASE MEMBER ON THE SURFACE OF A FLOOR, MEANS CARRIED BY SAID BASE MEMBER FOR TREATING SAID SURFACE, A PAIR OF DRIVING WHEEL MEANS SPACED LONGITUDINALLY OF SAID BASE MEMBER WITH RESPECT TO THE DIRECTION OF MOVEMENT THEREOF CARRIED BY SAID BASE MEMBER SOLELY FOR DRIVING SAID MACHINE AND CAPABLE OF SUPPORTING AT LEAST ANOTHER PORTION OF THE WEIGHT THEREOF, MEANS FOR SEPARATELY AND CONTINUOUSLY ROTATING THE RESPECTIVE WHEEL MEANS OF SAID PAIR IN OPPOSITE DIRECTIONS AND AT A SLOW SPEED SUITABLE FOR PROPELLING SAID MACHINE OVER SAID SURFACE WITHOUT SLIPPAGE OF SAID WHEEL MEANS RELATIVE TO SAID SURFACE WHEN IN CONTACT THEREWITH, AND MEANS FOR SELECTIVELY LOWERING EITHER OF SAID DRIVING
Claim 2
Dependent Claim
135 words
IN A PROPELLED FLOOR TREATING MACHINE, A BASE MEMBER, ANTI-FRICTION SUPPORT MEANS FOR SUPPORTING AT LEAST A PORTION OF THE WEIGHT OF SAID BASE MEMBER ON THE SURFACE OF A FLOOR, MEANS CARRIED BY SAID BASE MEMBER FOR TREATING SAID SURFACE, A PAIR OF DRIVING WHEEL MEANS SPACED LONGITUDINALLY OF SAID BASE MEMBER WITH RESPECT TO THE DIRECTION OF MOVEMENT THEREOF CARRIED BY SAID BASE MEMBER SOLELY FOR DRIVING SAID MACHINE AND CAPABLE OF SUPPORTING AT LEAST ANOTHER PORTION OF THE WEIGHT THEREOF, MEANS FOR SEPARATELY AND CONTINUOUSLY ROTATING THE RESPECTIVE WHEEL MEANS OF SAID PAIR IN OPPOSITE DIRECTIONS AND AT A SLOW SPEED SUITABLE FOR PROPELLING SAID MACHINE OVER SAID SURFACE WITHOUT SLIPPAGE OF SAID WHEEL MEANS RELATIVE TO SAID SURFACE WHEN IN CONTACT THEREWITH, AND MEANS FOR SELECTIVELY LOWERING EITHER OF SAID DRIVING
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |