US2495284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycyanohydrin made by reacting hydrogen cyanide with a monoolefin/carbon monoxide polymer
Assignee: EIDP Inc
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Filing: 1948-08-03
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Granted: 1950-01-24
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Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Paul S Pinkney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:28
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A POLYCYANOHYDRIN WHICH IS THE REACTION PRODUCT IN BASIC MEDIUM OF REACTANTS CONSISTING OF HYDROGEN CYANIDE AND A MONOOLEFIN/CARBON MONOXIDE POLYMER, AND IN WHICH AT LEAST 4% OF THE CARBONYL GROUPS IN SAID POLYKETONE ARE CONVERTED TO CYANOHYDRIN GROUPS, SAID POLYKETONE HAVING A MOLECULAR WEIGHT OF FROM 250 TO 10,000 AND BEING THE POLYMERIZATION PRODUCT OF A 2 TO 4 CARBON ATOM MONOOLEFIN WITH CARBON MONOXIDE IN A MOLE RATIO OF SAID MONOOLEFIN TO CARBON MONOXIDE OF FROM 1 TO 150:1.
References Cited (Backward Citations)
US2457279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |