US2944952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer removal
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-07-14
•
Granted: 1960-07-12
•
Expires: 1973-07-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Talmage D Mcminn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:31
CPC Classifications
B; B03; B03C; B03C5/00; C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR PURIFYING AN ORGANIC SOLVENT WHICH HAS BEEN USED FOR PURIFICATION OF ACETYLENE BY ABSORPTION AND IS CONTAMINATED BY THE PRESENCE OF SUSPENDED POLYMERIC MATERIAL WHICH COMPRISES SUBJECTING SAID SOLVENT IN A SUITABLE APPARATUS, TO THE ACTION OF AN ELECTRIC FIELD ESTABLISHED BY A DIRECT POTENTIAL DIFFERENCE BETWEEN TWO CONDUCTING SURFACES.
Claim 2
Dependent Claim
53 words
A PROCESS FOR PURIFYING AN ORGANIC SOLVENT WHICH HAS BEEN USED FOR PURIFICATION OF ACETYLENE BY ABSORPTION AND IS CONTAMINATED BY THE PRESENCE OF SUSPENDED POLYMERIC MATERIAL WHICH COMPRISES SUBJECTING SAID SOLVENT IN A SUITABLE APPARATUS, TO THE ACTION OF AN ELECTRIC FIELD ESTABLISHED BY A DIRECT POTENTIAL DIFFERENCE BETWEEN TWO CONDUCTING SURFACES.
References Cited (Backward Citations)
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Cited
US2077505A
Cited
US2063680A
Cited
US2292608A
Cited
US2485335A
Cited
US2715947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |