Patent US2870099A successfully refreshed from Google Patents.
US2870099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymers of epoxide compounds
Assignee: Shell Development Co
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Filing: 1956-02-02
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Granted: 1959-01-20
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Edward T Borrows
- 👤 David G Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:02
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; C07; C07D; C07D319/00; C07D319/10; C07D319/12; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2651; C08G65/2654
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE PRODUCTION OF A POLYMER OF AN EPOXIDE COMPOUND WHICH COMPRIES POLYMERIZING A VICE-EPOXY HYDROCARBON FREE OF UNSATURATION OTHER THAN AROMATIC UNSATURATION AT ABOUT 0 TO 200* C. IN THE PRESENCE OF ABOUT 0.1 TO 2% BY WEIGHT OF A CATALYST OF THE FORMULA ME(OR)$ WHEREIN ME IS A METAL SELECTED FROM THE GROUP CONSISTING OF THE METALS IN GROUPS II AND IS THE VALENCY OF THE METAL ME.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE PRODUCTION OF A POLYMER OF AN EPOXIDE COMPOUND WHICH COMPRIES POLYMERIZING A VICE-EPOXY HYDROCARBON FREE OF UNSATURATION OTHER THAN AROMATIC UNSATURATION AT ABOUT 0 TO 200* C. IN THE PRESENCE OF ABOUT 0.1 TO 2% BY WEIGHT OF A CATALYST OF THE FORMULA ME(OR)$ WHEREIN ME IS A METAL SELECTED FROM THE GROUP CONSISTING OF THE METALS IN GROUPS II AND IS THE VALENCY OF THE METAL ME.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |