Patent US3328829A successfully refreshed from Google Patents.
US3328829A
Expired / Lapsed
US
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Carpet shampooer
Assignee: Harrisburg University of Science and Technology
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Filing: 1965-05-24
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Granted: 1967-07-04
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Dan R Nighswander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:51
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4088; A47L11/32; A47L11/325; A47L11/4036; A47L11/4041; A47L11/4083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A CARPET SHAMPOOER COMPRISING: A HOUSING; ROLLER MEANS ROTATABLY CARRIED BY SAID HOUSING; BRUSH MEANS CARRIED BY SAID HOUSING AND POSITIONED FORE AND AFT IN RESPECT TO SAID ROLLER MEANS AND ADAPTED TO SCRUB THE CARPET TO BE CLEANED; DETERGENT SUPPLY MEANS ADAPTED TO SUPPLY A CONTROLLED AMOUNT OF DETERGENT TO THE SURFACE OF SAID ROLLER MEANS FOR DELIVERY THEREBY TO THE NAP; AND RESILIENT PAD MEANS PRESSED AGAINST SAID ROLLER MEANS TO THEREBY AGITATE THE DETERGENT AS IT IS BROUGHT THROUGH THE CONTACT AREA OF SAID PAD MEANS AND SAID ROLLER MEANS BEFORE ITS DELIVERY TO THE CARPET BY SAID ROLLER MEANS.
Claim 2
Dependent Claim
103 words
A CARPET SHAMPOOER COMPRISING: A HOUSING; ROLLER MEANS ROTATABLY CARRIED BY SAID HOUSING; BRUSH MEANS CARRIED BY SAID HOUSING AND POSITIONED FORE AND AFT IN RESPECT TO SAID ROLLER MEANS AND ADAPTED TO SCRUB THE CARPET TO BE CLEANED; DETERGENT SUPPLY MEANS ADAPTED TO SUPPLY A CONTROLLED AMOUNT OF DETERGENT TO THE SURFACE OF SAID ROLLER MEANS FOR DELIVERY THEREBY TO THE NAP; AND RESILIENT PAD MEANS PRESSED AGAINST SAID ROLLER MEANS TO THEREBY AGITATE THE DETERGENT AS IT IS BROUGHT THROUGH THE CONTACT AREA OF SAID PAD MEANS AND SAID ROLLER MEANS BEFORE ITS DELIVERY TO THE CARPET BY SAID ROLLER MEANS.
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |