US3422056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing isotactic polypropylene and carbon black mixtures
Assignee: Polymer Dispersions Inc
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Filing: 1965-07-14
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Granted: 1969-01-14
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Expires: 1985-07-14
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Carton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:29
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08J3/201; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2423/00
Claims Analysis
Total Claims: 0
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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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |