US3201346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device and method for cleaning cleaner's solvent
Assignee: LLOYD A OTTOMEYER
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Filing: 1962-09-10
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Granted: 1965-08-17
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Malcolm H Benedict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:15
CPC Classifications
B; B01; B01D; B01D37/00; D; D06; D06F; D06F43/00; D06F43/08; D06F43/081; D06F43/085; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/916; Y10S210/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A METHOD OF TREATING USED CLEANING SOLVENT IN A CONTINUOUS FLOW WHICH COMPRISES THE SUCCESSIVE STEPS OF PASSING THE CLEANING SOLVENT THROUGH A CONFINED ZONE BY GRAVITATIONAL FLOW, FIRST REMOVING DISCOLORING CONSTITUENTS INCLUDING DYES BY PASSING THE SOLVENT THROUGH A LAYER OF ACTIVATED CARBON IN SAID ZONE, THEN REMOVING DISCOLORING CONSTITUENTS INCLUDING DYES BY PASSING THE SOLVENT THROUGH A LAYER OF WOOD PULP IN SAID ZONE, THEN REMOVING ODORS AND FATTY ACIDS BY PASSING THE SOLVENT THROUGH A LAYER OF MAGNESIUM SILICATE IN SAID ZONE, AND THEN REMOVING DISCOLORING CONSTITUENTS INCLUDING DYES BY PASSING THE SOLVENT THROUGH A SECOND LAYER OF WOOD PULP IN SAID ZONE PRIOR TO DISCHARGE OF THE SOLVENT IN A CLEANED CONDITION FROM SAID ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |