Patent US3640943A successfully refreshed from Google Patents.
US3640943A
Expired / Lapsed
US
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Polymer-filler composition
Assignee: General Electric Co
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Filing: 1969-07-07
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Granted: 1972-02-08
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Expires: 1989-07-07
Abstract
Abstract A POLYMER-FILLER COMPOSITION HAVING IMPROVED PROPERTIES COMPRISED OF A BASE POLYMER, A FILLER AND A SURFACEACTIVE ADDITIVE WHICH IS A BLOCK COPOLYMER. THE BLOCK COPOLYMER ADDITIVE CONTAINS AT LEAST TWO POLYMERIZED COMONOMERS, ONE OF WHICH IS COMPATIBLE WITH THE BASE POLYMER THEREBY IMPARTING STABILITY TO THE COMPOSITION, AND THE SECOND OF WHICH IS SURFACE-ACTIVE IN THE COMPOSITION SO THAT THE BLOCK COPOLYMER IS CONCENTRATED AT THE INTERFACE BETWEEN THE FILLER AND BASE POLYMER TO PROVIDE A BOND THEREBETWEEN.
Inventors
- 👤 Edgar E Bostick
- 👤 George L Gaines Jr
- 👤 Donald G Le Grand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C08L; C08L69/00
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |