Patent US3179489A successfully refreshed from Google Patents.
US3179489A
Expired / Lapsed
US
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Process of preparing soluble phosphorus nitrile chloride polymers
Assignee: Individual
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Filing: 1958-12-22
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Granted: 1965-04-20
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Becke Margot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:40
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A PROCESS OF PREPARING A RUBBER-LIKE PHOSPHORUS NITRILE CH NITRILE CHLORIDE POLYMER, THE STEPS WHICH COMPRISE DISSOLVING AN OILY PHOSPHORUS NITRILE CHLORIDE OF AN AVERAGE DEGREE OF POLYMERIZATION BETWEEN 6 AND 20 IN AN ORGANIC SOLVENT CONTAINING AN AMOUNT OF WATER BETWEEN 0.5% AND 6.0% OF THE WEIGHT OF THE OILY PHOSPHORUS NITRILE CHLORIDE POLYMER USED AS STARTING MATERIAL AND HEATING THE SOLUTION ON A WATER BATH UNTIL THE DEGREE OF POLYMERIZATION OF THE RESULTING POLYMER IS BETWEEN 50 AND 200.
Claim 2
Dependent Claim
82 words
IN A PROCESS OF PREPARING A RUBBER-LIKE PHOSPHORUS NITRILE CH NITRILE CHLORIDE POLYMER, THE STEPS WHICH COMPRISE DISSOLVING AN OILY PHOSPHORUS NITRILE CHLORIDE OF AN AVERAGE DEGREE OF POLYMERIZATION BETWEEN 6 AND 20 IN AN ORGANIC SOLVENT CONTAINING AN AMOUNT OF WATER BETWEEN 0.5% AND 6.0% OF THE WEIGHT OF THE OILY PHOSPHORUS NITRILE CHLORIDE POLYMER USED AS STARTING MATERIAL AND HEATING THE SOLUTION ON A WATER BATH UNTIL THE DEGREE OF POLYMERIZATION OF THE RESULTING POLYMER IS BETWEEN 50 AND 200.
References Cited (Backward Citations)
US2586312A
Cited
US2872283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |