Patent US3682834A successfully refreshed from Google Patents.
US3682834A
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US
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Reducing the residue caused by the vaporization of chlorinated solvent to dryness
Assignee: Dow Chemical Co
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Filing: 1970-10-23
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Granted: 1972-08-08
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Expires: 1990-10-23
Abstract
Abstract BY ADDITION OF A SMALL BUT EFFECTIVE AMOUNT OF DIMETHOXYMETHANE TO A CHLORINATED SOLVENT CONTAINING BY VOLUME A MAJOR PORTION OF METHYLENE CHLORIDE, A MINOR PROPORTION OF PERCHLORCETHYLENE, TRICHLOROETHYLENE OR MIXTURE THEREOF AND A MINOR PROPORTION OF OTHER ORGANIC SOLVENTS, THE RESIDUE LEFT UPON THE VAPORIZATION OF THE SOLVENT TO DRYNESS IS REDUCED.
Inventors
- 👤 Thomas A Vivian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:39
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/04; C07C21/12; C07C17/00; C07C17/38; C07C17/42; C07C21/10
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |