Patent US3404019A successfully refreshed from Google Patents.
US3404019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coke ground in a nonoxidizing atmosphere
Assignee: Marathon Oil Co
•
Filing: 1965-03-04
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Granted: 1968-10-01
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 William W Gotshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:37
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01B; C01B32/00; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
44 words
A NON-STAINING FINELY DIVIDED CARBON SUITABLE FOR COMPOUNDING WITH POLYMERIC MATERIALS TO FORM HIGH STRENGTH, HIGH MODULUS COMPOSITIONS, COMPRISING COMMINUTED COKE HAVING AN AVERAGE PARTICLE SIZE OF NOT OVER 2.5 MICRONS, THE COKE HAVING BEEN GROUND TO SAID PARTICLE SIZE IN A NON-OXIDIZING ATMOSPHERE.
Claim 2
Dependent Claim
44 words
A NON-STAINING FINELY DIVIDED CARBON SUITABLE FOR COMPOUNDING WITH POLYMERIC MATERIALS TO FORM HIGH STRENGTH, HIGH MODULUS COMPOSITIONS, COMPRISING COMMINUTED COKE HAVING AN AVERAGE PARTICLE SIZE OF NOT OVER 2.5 MICRONS, THE COKE HAVING BEEN GROUND TO SAID PARTICLE SIZE IN A NON-OXIDIZING ATMOSPHERE.
Claim 3
Dependent Claim
22 words
THE FINELY DIVIDED CARBON OF CLAIM 1 WHEREIN THE PARTICLES HAVE A COATING OF A NON-DELETERIOUS BARRIER TO PREVENT CONTACT WITH OXYGEN.
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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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |