US3588943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner suction and brush control
Assignee: Whirlpool Corp
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Filing: 1968-11-12
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Granted: 1971-06-29
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Expires: 1988-11-12
Abstract
Abstract A VACUUM CLEANER HAVING A MOTOR FAN SUCTION UNIT AND A FLOOR CONTACTING MOTOR BRUSH UNIT WITH A SWITCH PREFERABLY ADJACENT TO THE HANDLE USED FOR PROPELLING THE MOTOR BRUSH UNIT OVER THE FLOOR BEING CLEANED WITH THIS SWITCH CONTROLLING CURRENT FLOW TO BOTH OF THE MOTORS.
Inventors
- 👤 Thomas E Hetland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2857; A47L9/2836; A47L9/2842; A47L9/2847; H; H02; H02P; H02P25/00; H02P25/02; H02P25/10; H02P25/14
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |