US2776909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry-cleaning and brightening of textiles
Assignee: Sandoz AG
•
Filing: 1952-11-18
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Granted: 1957-01-08
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Expires: 1972-11-18
Abstract
No abstract record available.
Inventors
- 👤 Fleck Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:38
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16; D; D06; D06L; D06L1/00; D06L1/02; D06L1/04; D06L4/00; D06L4/60; D06L4/614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF DRY-CLEANING AND OPTICALLY BRIGHTENING TEXTILE MATERIAL, WHICH COMPRISES SUBJECTING THE SAID MATERIAL TO THE DRY-CLEANING ACTION OF A COMPOSITION CONSISTING ESSENTIALLY OF A VOLATILE CHLORINATED HYDROCARBON WATER-IMMISCIBLE ORGANIC SOLVENT, AND 0.03 TO 0.3% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 2
Independent Claim
51 words
THE METHOD OF DRY-CLEANING AND OPTICALLY BRIGHTENING TEXTILE MATERIAL, WHICH COMPRISES SUBJECTING THE SAID MATERIAL TO THE DRY-CLEANING ACTION OF A COMPOSITION CONSISTING ESSENTIALLY OF A VOLATILE CHLORINATED HYDROCARBON WATER-IMMISCIBLE ORGANIC SOLVENT, AND 0.03 TO 0.3% BY WEIGHT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |