Patent US3158580A successfully refreshed from Google Patents.
US3158580A
Expired / Lapsed
US
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Poly (epihalohydrin) s
Assignee: Hercules Powder Co
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Filing: 1960-03-11
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Granted: 1964-11-24
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Expires: 1980-03-11
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:34
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
AS A NEW COMPOSITION OF MATTER, A SOLID, RUBBERY POLY(EPIHALOHYDRIN) CHARACTERIZED BY BEING ESSENTIALLY WHOLLY AMORPHOURS AS DETERMINED BY X-RAY ANALYSIS, SOLUBLE IN ACETONE AT ROOM TEMPERATURE, AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.2 AS MEASURED ON A 0.1% SOLUTION OF THE POLYMER IN A-CHLORONAPHTHALENE AT 100*C.
Claim 2
Dependent Claim
51 words
AS A NEW COMPOSITION OF MATTER, A SOLID, RUBBERY POLY(EPIHALOHYDRIN) CHARACTERIZED BY BEING ESSENTIALLY WHOLLY AMORPHOURS AS DETERMINED BY X-RAY ANALYSIS, SOLUBLE IN ACETONE AT ROOM TEMPERATURE, AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.2 AS MEASURED ON A 0.1% SOLUTION OF THE POLYMER IN A-CHLORONAPHTHALENE AT 100*C.
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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |