Patent US2030503A successfully refreshed from Google Patents.
Patent US2958712A successfully refreshed from Google Patents.
US2958712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of chlorinated hydrocarbons
Assignee: EIDP Inc
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Filing: 1958-03-06
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Granted: 1960-11-01
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Expires: 1978-03-06
Abstract
No abstract record available.
Inventors
- 👤 Fred W Starks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:02
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF STABILIZING A CHLORINATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF TRICHLORETHYLENE AND PERCHLORETHYLENE WHICH COMPRISES SUPPLYIG THERETO A LACTONE SELECTED FROM THE GROUP CONSISTING OF MONO- AND DI-LACTONES IN WHICH ALL OF THE LACTONE RINGS CONTAIN 3-6 CARBON ATOMS, SAID LACTONE BEING SOLUBLE IN SAID CHLORINATED HYDROCARBON IN AN AMOUNT EFFECTIVE TO STABILIZE THE SAME AGAINST DECOMPOSITION INDUCED BY METALS AND METALLIC SALTS.
Claim 2
Independent Claim
66 words
THE METHOD OF STABILIZING A CHLORINATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF TRICHLORETHYLENE AND PERCHLORETHYLENE WHICH COMPRISES SUPPLYIG THERETO A LACTONE SELECTED FROM THE GROUP CONSISTING OF MONO- AND DI-LACTONES IN WHICH ALL OF THE LACTONE RINGS CONTAIN 3-6 CARBON ATOMS, SAID LACTONE BEING SOLUBLE IN SAID CHLORINATED HYDROCARBON IN AN AMOUNT EFFECTIVE TO STABILIZE THE SAME AGAINST DECOMPOSITION INDUCED BY METALS AND METALLIC SALTS.
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |