US2755208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning work objects having limited temperature tolerance
Assignee: Detrex Corp
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Filing: 1953-09-24
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Granted: 1956-07-17
•
Expires: 1973-09-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Kearney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:08
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A METHOD OF CLEANING AN ARTICLE WHICH HAS AN OILY OR GREASY SURFACE AND WHICH CONSISTS ESSENTIALLY OF A SOLID MATERIAL WHICH IS INSOLUBLE IN METHYLENE CHLORIDE AND WHICH IS DAMAGED WHEN HEATED TO ABOUT 105-115* F., THE STEPS WHICH COMPRISES BOILING METHYLENE CHLORIDE LIQUID SOLVENT FORMING A SUBSTANTIALLY PURE METHYLENE CHLORIDE VAPOR ABOVE SAID LIQUID, SAID VAPOR BEING AT SUBSTANTIALLY ATMOSPHERIC PRESSURE AND BEING SUBSTANTIALLY FREE OF ORGANIC IMPURITIES AND HAVING A TEMPERATURE SUBSTANTIALLY EQUAL TO THE BOILING POINT OF PURE METHYLENE CHLORIDE AT ATMOSPHERIC PRESSURE, WHICH IS ABOUT 103.6* F., CONDENSING THE SOLVENT VAPORS, COLLECTING THE RESULTING LIQUID METHYLENE CHLORIDE DISTILLATE, CONTACTING THE ARTICLE WITH THE METHYLENE CHLORIDE VAPOR AND WITH LIQUID METHYLENE CHLORIDE DISTILLATE TO DEGREASE THE SAME, AND REMOVING THE ARTICLE FROM THE METHYLENE CHLORIDE.
Claim 2
Dependent Claim
130 words
IN A METHOD OF CLEANING AN ARTICLE WHICH HAS AN OILY OR GREASY SURFACE AND WHICH CONSISTS ESSENTIALLY OF A SOLID MATERIAL WHICH IS INSOLUBLE IN METHYLENE CHLORIDE AND WHICH IS DAMAGED WHEN HEATED TO ABOUT 105-115* F., THE STEPS WHICH COMPRISES BOILING METHYLENE CHLORIDE LIQUID SOLVENT FORMING A SUBSTANTIALLY PURE METHYLENE CHLORIDE VAPOR ABOVE SAID LIQUID, SAID VAPOR BEING AT SUBSTANTIALLY ATMOSPHERIC PRESSURE AND BEING SUBSTANTIALLY FREE OF ORGANIC IMPURITIES AND HAVING A TEMPERATURE SUBSTANTIALLY EQUAL TO THE BOILING POINT OF PURE METHYLENE CHLORIDE AT ATMOSPHERIC PRESSURE, WHICH IS ABOUT 103.6* F., CONDENSING THE SOLVENT VAPORS, COLLECTING THE RESULTING LIQUID METHYLENE CHLORIDE DISTILLATE, CONTACTING THE ARTICLE WITH THE METHYLENE CHLORIDE VAPOR AND WITH LIQUID METHYLENE CHLORIDE DISTILLATE TO DEGREASE THE SAME, AND REMOVING THE ARTICLE FROM THE METHYLENE CHLORIDE.
References Cited (Backward Citations)
US2541703A
Cited
US2101841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |