Patent US2809177A successfully refreshed from Google Patents.
US2809177A
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Polyhydroxy-substituted polyethers, their preparation and resinous products prepared therefrom
Assignee: Shell Development Co
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Filing: 1956-02-27
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Granted: 1957-10-08
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Expires: 1976-02-27
Abstract
No abstract record available.
Inventors
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:50
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4875; C08G59/02; C08G59/04; C08G59/14; C08G59/1405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A RESINOUS PRODUCT OF THE GROUP CONSISTING OF HYDROGENATED POLY(EPOXYALKYL) POLYETHERS OF POLYHYDRIC PHENOLS WHICH POLYEPOXY POLYETHERS HAVE AN EPOXY EQUIVALENCY GREATER THAN 1.0, AND THEIR ETHERS, ESTERS AND URETHANES.
Claim 2
Dependent Claim
30 words
A RESINOUS PRODUCT OF THE GROUP CONSISTING OF HYDROGENATED POLY(EPOXYALKYL) POLYETHERS OF POLYHYDRIC PHENOLS WHICH POLYEPOXY POLYETHERS HAVE AN EPOXY EQUIVALENCY GREATER THAN 1.0, AND THEIR ETHERS, ESTERS AND URETHANES.
References Cited (Backward Citations)
No citation records indexed.
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 |