US2737532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of perchloroethylene with alkoxyalkylnitriles
Assignee: Columbia Southern Chemical Corp
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Filing: 1953-02-17
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Granted: 1956-03-06
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Expires: 1973-02-17
Abstract
No abstract record available.
Inventors
- 👤 Strain Franklin
- 👤 Witt Bernard J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:36
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
THE METHOD OF STABILIZING PERCHLOROETHYLENE WHICH COMPRISES ADDING THERETO A SMALL STABLIZING AMOUNT OF AN ALKOXYALKYLNITRILE HAVING UP TO 3 CARBON ATOMS IN THE ALKOXY GROUP AND UP TO 3 CARBON ATOMS IN THE ALKYL GROUP.
Claim 2
Independent Claim
36 words
THE METHOD OF STABILIZING PERCHLOROETHYLENE WHICH COMPRISES ADDING THERETO A SMALL STABLIZING AMOUNT OF AN ALKOXYALKYLNITRILE HAVING UP TO 3 CARBON ATOMS IN THE ALKOXY GROUP AND UP TO 3 CARBON ATOMS IN THE ALKYL GROUP.
Claim 3
Dependent Claim
34 words
A COMPOSITION OF MATTER COMPRISING PERCHLOROETHYLENE AND A SMALL STABLIZING AMOUNT OF AN ALKOXYALKYLNITRILE HAVING UP TO 3 CARBON ATOMS IN THE ALKOXY GROUP AND UP TO 3 CARBON ATOMS IN THE ALKYL GROUP.
Claim 4
Dependent Claim
34 words
A COMPOSITION OF MATTER COMPRISING PERCHLOROETHYLENE AND A SMALL STABLIZING AMOUNT OF AN ALKOXYALKYLNITRILE HAVING UP TO 3 CARBON ATOMS IN THE ALKOXY GROUP AND UP TO 3 CARBON ATOMS IN THE ALKYL GROUP.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |