US2979481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black-rubber masterbatch production
Assignee: Phillips Petroleum Co
•
Filing: 1956-12-26
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Granted: 1961-04-11
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Expires: 1976-12-26
Abstract
No abstract record available.
Inventors
- 👤 Robert S Hanmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08L; C08L21/00; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN THE PROCESS OF PRODUCING CARBON BLACK-RUBBER MASTERBATCH WHEREIN A LATEX-CARBON BLACK SLURRY IS COAGULATED TO FORM A CRUMB, THE IMPROVEMENT COMPRISING PASSING LIQUID SEPARATED FROM THE CRUMB AND CONTAINING FINES THROUGH A MASS OF THE CRUMB THEREBY REMOVING SAID FINES FROM SAID LIQUID.
Claim 2
Dependent Claim
44 words
IN THE PROCESS OF PRODUCING CARBON BLACK-RUBBER MASTERBATCH WHEREIN A LATEX-CARBON BLACK SLURRY IS COAGULATED TO FORM A CRUMB, THE IMPROVEMENT COMPRISING PASSING LIQUID SEPARATED FROM THE CRUMB AND CONTAINING FINES THROUGH A MASS OF THE CRUMB THEREBY REMOVING SAID FINES FROM SAID LIQUID.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |