Patent US3106549A successfully refreshed from Google Patents.
US3106549A
Expired / Lapsed
US
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Polymers of lower alkyl glycidates
Assignee: Hercules Powder Co
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Filing: 1959-08-24
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Granted: 1963-10-08
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Expires: 1979-08-24
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:30
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
AS A NEW COMPOSITION OF MATTER A CRYSTALLINE HOMOPOLYMER OF AN ALKYL GLYCIDATE WHEREIN SAID ALKYL GROUP CONTAINS FROM 1-4 CARBON ATOMS, SAID HOMOPOLYMER BEING CHARACTERIZED BY HAVING A SUBSTANTIALLY LINEAR POLYETHER STRUCTURE, EXHIBITING A CRYSTALLINE-TYPE X-RAY DIFFRACTION POWDER PATTERN, AND HAVING A REDUCED SPECIFIC VISCOSITY OF AT LEAST ABOUT 0.2 AS MEASURED IN A-CHLORONAPHTHALENE AT 135*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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |