US3689211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cleaning method
Assignee: Dow Chemical Co
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Filing: 1970-03-05
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Granted: 1972-09-05
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Expires: 1990-03-05
Abstract
Abstract AN IMPROVED METHOD FOR DRY CLEANING FABRICS, E.G., COTTON, COTTON-SYNTHETIC BLENDS, RAYON, NYLON, WOOL, WORSTED, ETC, WHCIH COMPRISES A THREE-STEP PROCESS: (A) CONTACTING THE FABRIC WITH A DRY CLEANING SOLVENT CONTAINING FROM 0.005 TO 25 VOLUME PERCENT OF H2O AND 0.01 TO 5 VOLUME PERCENT OF A DETERGENT FOR FROM ONE TO 20 MINUTES; AND THEN, IN ANY ORDER, (B) CONTACTING THE FABRIC WITH A DRY CLEANING SOLVENT CONTAINING 0.01 TO 15 VOLUME PERCENT OF A DETERGENT FOR FROM ONE TO 20 MINUTES; AND (C) CONTACTING THE FABRIC WITH A DRY CLEANING SOLVENT CONTAINING 0.01 TO 5 VOLUME PERCENT OF A DETERGENT FOR FROM ONE TO 20 MINUTES.
Inventors
- 👤 John J Giampalmi Jr
- 👤 Istvan K Telegdy
- 👤 Manfred Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:53
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; D06F; D06F43/00; D06F43/007; D06L1/08; D06L1/22
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |