US2809186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New polyols from polyaldehydes, their preparation and derivatives
Assignee: Shell Development Co
•
Filing: 1954-08-16
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Granted: 1957-10-08
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Smith Curtis William
- 👤 Theodore W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:12
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/14; C08G2/18; C08G2/20; C08G6/00; C08G6/02; Y; Y10; Y10S; Y10S525/00; Y10S525/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR PREPARING POLYOLS WHICH COMPRISES MIXING A POLYALDEHYDE HAVING AT LEAST TWO ALDEHYDE GROUPS ONE OF WHICH IS JOINED TO A CARBON ATOM BEARING A REPLACEABLE HYDROGEN ATOM AND BEING SELECTED FROM THE GROUP CONSISTING OF ALPHA-HYDROXYADIPALDEHYDES, ADDITION POLYMERS OF ALPHA,BETA-ETHYLENICALLY UNSATURATED ALDEHYDES, DIALDEHYDES OF THE FORMULA
Claim 2
Dependent Claim
49 words
A PROCESS FOR PREPARING POLYOLS WHICH COMPRISES MIXING A POLYALDEHYDE HAVING AT LEAST TWO ALDEHYDE GROUPS ONE OF WHICH IS JOINED TO A CARBON ATOM BEARING A REPLACEABLE HYDROGEN ATOM AND BEING SELECTED FROM THE GROUP CONSISTING OF ALPHA-HYDROXYADIPALDEHYDES, ADDITION POLYMERS OF ALPHA,BETA-ETHYLENICALLY UNSATURATED ALDEHYDES, DIALDEHYDES OF THE FORMULA
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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 |