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Patent US2809185A successfully refreshed from Google Patents.
US2809185A
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Polymerization of unsaturated aldehydes with nitrite catalysts
Assignee: Shell Development Co
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Filing: 1954-10-25
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Granted: 1957-10-08
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Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 George W Hearne
- 👤 France Donald S La
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:30
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/14; C08G2/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR POLYMERIZING ALPHA-BETA-ETHYLENICALLY UNSATURATED ALDEHYDES TO FORM POLYMERS WHICH MAY BE HYDROGENATED TO FORM POLYMERIC POLYHYDRIC ALCOHOLS WHICH COMPRISES CONTACTING AT A TEMPERATURE BETWEEN 0* C. AND 100*C. A MONOMER COMPOSITION CONTAINING AN ALPHA,BETA-ETHYLENICALLY UNSATURATED ALDEHYDE WITH A CATALYTIC AMOUNT OF A CATALYST OF TH GROUP CONSISTING OF ALKALI AND ALKALINE EARTH NITRITES.
Claim 2
Dependent Claim
55 words
A PROCESS FOR POLYMERIZING ALPHA-BETA-ETHYLENICALLY UNSATURATED ALDEHYDES TO FORM POLYMERS WHICH MAY BE HYDROGENATED TO FORM POLYMERIC POLYHYDRIC ALCOHOLS WHICH COMPRISES CONTACTING AT A TEMPERATURE BETWEEN 0* C. AND 100*C. A MONOMER COMPOSITION CONTAINING AN ALPHA,BETA-ETHYLENICALLY UNSATURATED ALDEHYDE WITH A CATALYTIC AMOUNT OF A CATALYST OF TH GROUP CONSISTING OF ALKALI AND ALKALINE EARTH NITRITES.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |