Patent US3447754A successfully refreshed from Google Patents.
US3447754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam cleaning
Assignee: Lewo Chem Fab Fa GmbH
•
Filing: 1965-10-04
•
Granted: 1969-06-03
•
Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Egon Nohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:59
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4088; A47L11/32; A47L11/325; A47L11/4083; B; B05; B05B; B05B7/00; B05B7/0018; B05B7/0025; B05B7/0031; B05B7/0037; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
APPARATUS FOR CLEANING AND MAINTAINING COARSE FABRICS SUCH AS TEXTILE FLOOR COVERINGS COMPRISING; A CONTAINER; A CONTAINER BOTTOM PART FOR RECEIVING A LIQUID TREATMENT AGENT; A CONTAINER UPPER PART ADAPTED FOR DISCHARGE OF FOAM AND BEING TAPERED INWARDLY AND UPWARDLY AWAY FROM SAID BOTTOM PART; A SIEVE IN SAID UPPER PART; A GAS SUPPLY PIPE SECURED IN SAID UPPER PART, EXTENDING INTO SAID BOTTOM PART AND BEING ADAPTED TO BE CONNECTED TO A SOURCE OF COMPRESSED GAS; AND OUTLET OPENINGS IN
Claim 2
Dependent Claim
81 words
APPARATUS FOR CLEANING AND MAINTAINING COARSE FABRICS SUCH AS TEXTILE FLOOR COVERINGS COMPRISING; A CONTAINER; A CONTAINER BOTTOM PART FOR RECEIVING A LIQUID TREATMENT AGENT; A CONTAINER UPPER PART ADAPTED FOR DISCHARGE OF FOAM AND BEING TAPERED INWARDLY AND UPWARDLY AWAY FROM SAID BOTTOM PART; A SIEVE IN SAID UPPER PART; A GAS SUPPLY PIPE SECURED IN SAID UPPER PART, EXTENDING INTO SAID BOTTOM PART AND BEING ADAPTED TO BE CONNECTED TO A SOURCE OF COMPRESSED GAS; AND OUTLET OPENINGS IN
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |