US3769257A
Expired / Lapsed
US
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Preparation of solution polymer masterbatches
Assignee: Cabot Corp
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Filing: 1972-02-22
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Granted: 1973-10-30
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Expires: 1992-02-22
Abstract
Abstract THIS DISCLOSURE RELATES TO A CONTINUOUS PROCESS FOR THE PREPARATION OF BLACK MASTERBATCHES OF SOLUTION POLYMER WHEREIN DRYING OF THE RUBBERY CRUMB IS ACCOMPLISHED BY CONTACTING THE CRUMB WITH A GASEOUS MEDIUM AT A TEMPERATURE AND VELOCITY SUFFICIENT TO ASPIRATE AND DRY THE CRUMB.
Inventors
- 👤 P Gridley
- 👤 J Brennan
- 👤 F Quincy
- 👤 E Lexington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:00
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K3/00; C08K3/02; C08K3/04; Y; Y10; Y10S; Y10S159/00; Y10S159/03; Y10S159/10
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |