US3796684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer compositions stabilized with substituted 4,5-benzo-1,3,2-dioxaphospholanes
Assignee: Borg Warner Corp
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Filing: 1971-05-24
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Granted: 1974-03-12
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Expires: 1991-05-24
Abstract
Abstract THIS INVENTION IS DIRECTION TO A COMPOSITION COMPRISING A POLYMER AND A NOVEL STABILIZER OF THE FORMULA: 2-(R2-O-),(R1)N1-1,3,2-BENZODIOXAPHOSPHOLE IN WHICH R2 IS SELECTED FROM THE GROUP CONSISTING OF ARYL AND SUBSTITUTED ARYL, R1 IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, SUBSTITUTED ALKYL, ARYL AND SUBSTITUTED ARYL, AND N1 IS FROM 0 TO 4. WHERE N1 IS MORE THAN 1, THE SUBSTITUENTS R1 MAY BE THE SAME OR DIFFERENT. POLYMERS STABILIZED IN THE PRACTICE OF THIS INVENTION INCLUDE POLYETHYLENE, POLYPROPYLENE, ACRYLONITRILE-BUTADIENE-STYRENE COPOLYMERS AND POLYSTYRENE.
Inventors
- 👤 J Dever
- 👤 J Hodan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/527; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C07F9/65744
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |