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Patent US3029216A successfully refreshed from Google Patents.
US3029216A
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Block copolymer of dissimilar 1, 2-alkylene oxides and process for preparing the same
Assignee: Union Carbide Corp
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Filing: 1958-08-11
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Granted: 1962-04-10
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick E Bailey
- 👤 Haywood G France
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:26
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A RESINOUS BLOCK COPOLYMER WHICH COMPRISES A HOMOPOLYMERIZED BLOCK OF A 1,2-ALKYLENE OXIDE LINEARLY UNITED TO A HOMOPOLYMERIZED BLOCK OF A DISSIMILAR 1,2ALKYLENE OXIDE, SAID BLOCK COPOLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 25,000.
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |