US3825620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aba block polymers of polyester and polyethers
Assignee: BP Corp North America Inc
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Filing: 1972-10-17
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Granted: 1974-07-23
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Expires: 1992-10-17
Abstract
Abstract THE INVENTION RELATES TO NOVEL, SOLID, SUBSTANTIALLY WATERINSOLUBLE ABA BLOCK POLYMERS IN WHICH A BLOCKS COMPRISES RECURRING LINEAR UNITS OF THE FORMULA -(O-R''-O-CO-R-CO)- WHEREIN THE SUBSTITUENTS R AND R'' ARE DIVALENT ALIPHATIC GROUPS AND IN WHICH THE B BLOCK COMPRISES RECURRING OXYALKYLENE UNITS. THE BLOCK POLYMERS HAVE UTIILIITY AS PLASTICIZERS FOR POLYVINYL CHLORIDE RESINS AND AS DYE ASSISTS FOR POLYPROPYLENE FIBER.
Inventors
- 👤 J Koleske
- 👤 R Roberts
- 👤 Giudice F Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:46
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/928
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |