US4012194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction and cleaning processes
Assignee: Individual
•
Filing: 1973-08-02
•
Granted: 1977-03-15
•
Expires: 1993-08-02
Abstract
Abstract Extraction and cleaning processes characterized by the use of liquid carbon dioxide as the extraction and cleaning solvent. This solvent is disclosed as being applied to plant material for the extraction of essential oils and as being used in place of the conventional solvents in the dry cleaning of garments.
Inventors
- 👤 Raymond L. Maffei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:19
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; D06F; D06F43/00; D06F43/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A garment cleaning process consisting essentially of passing liquid carbon dioxide through garments to be cleaned by placing the garments within a closed container and admitting liquid carbon dioxide into the container from a refrigerated storage container, transferring the liquid carbon dioxide from the container to an evaporator, removing the dissolved garment soil material from the carbon dioxide by converting the liquid carbon dioxide to gaseous carbon dioxide in the evaporator, collecting the garment soil material in the evaporator and discarding it, and transferring carbon dioxide from the evaporator to a refrigerated condenser and then to the refrigerated storage container.
Claim 2
Dependent Claim
100 words
A garment cleaning process consisting essentially of passing liquid carbon dioxide through garments to be cleaned by placing the garments within a closed container and admitting liquid carbon dioxide into the container from a refrigerated storage container, transferring the liquid carbon dioxide from the container to an evaporator, removing the dissolved garment soil material from the carbon dioxide by converting the liquid carbon dioxide to gaseous carbon dioxide in the evaporator, collecting the garment soil material in the evaporator and discarding it, and transferring carbon dioxide from the evaporator to a refrigerated condenser and then to the refrigerated storage container.
References Cited (Backward Citations)
US1197495A
Cited
US1805751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |