Patent US3238137A successfully refreshed from Google Patents.
US3238137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable solvent compositions
Assignee: Ethyl Corp
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Filing: 1961-03-29
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Granted: 1966-03-01
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Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 George N Grammer
- 👤 Percy W Trotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:09
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02854; C23G5/02883; C23G5/02887; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A STABLE SOLVENT COMPOSITION CONSISTING ESSENTIALLY OF 1,1,1-TRICHLOROETHANE CONTAINING FROM ABOUT 0.3 TO ABOUT 12 WEIGHT PERCENT OF A MIXTURE CONSISTING ESSENTIALLY OF FROM ABOUT 10 TO ABOUT 80 WEIGHT PERCENT OF A DIOXOLANE COMPOUND, FROM ABOUT 10 TO ABOUT 60 WEIGHT PERCENT OF AN EPOXIDE COMPOUND, AND FROM ABOUT 10 TO ABOUT 80 WEIGHT PERCENT OF A NITROALIPHATIC COMPOUND DISSOLVED THEREIN, SUFFICIENT TO INHIBIT THE 1,1,1-TRICHLOROETHANE AGAINST DECOMPOSITION, SAID DIOXOLANE COMPOUND BEING A 1.3-DIOXOLANE COMPOUND CONTAINING UP TO 2 ALKYL SUBSTITUENTS EACH HAVING FROM 1 TO 2 CARBON ATOMS, SAID EPOXIDE BEING A COMPOUND CONTAINING FROM ABOUT 3 TO ABOUT 4 CARBON ATOMS AND UP TO 1 CHLORINE ATOM, AND SAID NITROALIPHATIC COMPOUND HAVING NOT MORE THAN 3 CARBON ATOMS.
Claim 2
Dependent Claim
121 words
A STABLE SOLVENT COMPOSITION CONSISTING ESSENTIALLY OF 1,1,1-TRICHLOROETHANE CONTAINING FROM ABOUT 0.3 TO ABOUT 12 WEIGHT PERCENT OF A MIXTURE CONSISTING ESSENTIALLY OF FROM ABOUT 10 TO ABOUT 80 WEIGHT PERCENT OF A DIOXOLANE COMPOUND, FROM ABOUT 10 TO ABOUT 60 WEIGHT PERCENT OF AN EPOXIDE COMPOUND, AND FROM ABOUT 10 TO ABOUT 80 WEIGHT PERCENT OF A NITROALIPHATIC COMPOUND DISSOLVED THEREIN, SUFFICIENT TO INHIBIT THE 1,1,1-TRICHLOROETHANE AGAINST DECOMPOSITION, SAID DIOXOLANE COMPOUND BEING A 1.3-DIOXOLANE COMPOUND CONTAINING UP TO 2 ALKYL SUBSTITUENTS EACH HAVING FROM 1 TO 2 CARBON ATOMS, SAID EPOXIDE BEING A COMPOUND CONTAINING FROM ABOUT 3 TO ABOUT 4 CARBON ATOMS AND UP TO 1 CHLORINE ATOM, AND SAID NITROALIPHATIC COMPOUND HAVING NOT MORE THAN 3 CARBON ATOMS.
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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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |