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US3754053A
Expired / Lapsed
US
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Polyoxymethylene-oxyalkylene block polymers
Assignee: Celanese Corp
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Filing: 1964-05-15
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Granted: 1973-08-21
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Expires: 1984-05-15
Abstract
Abstract THIS APPLICATION RELATES TO BLOCK COPOLYMERS AND MORE PARTICULARLY TO BLOCK COPOLYMERS HAVING POLYXYMETHYLENE SEGMENTS AND SEGMENTS HAVING RECURRING OXYALKYLENE GROUPS WHICH MORE THAN ONE CARBON ATOM.
Inventors
- 👤 R Kray
- 👤 R Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:45
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/38; C08G2/08; C08G65/00; C08G65/02; C08G65/04; C08G65/06
Claims Analysis
Total Claims: 0
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |