Patent US3081185A successfully refreshed from Google Patents.
US3081185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent-resistant molded articles
Assignee: Phillips Petroleum Co
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Filing: 1959-12-28
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Granted: 1963-03-12
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Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 Harry W Parker
- 👤 John W Marx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/12; C04B18/125; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
A SUBSTANTIALLY INSOLUBLE ARTICLE PREPARED BY WETTING A FINELY DIVIDED OIL SHALE, CONTAINING FROM ABOUT 15 TO ABOUT 85 GALLONS OF NON-BENZENOID KEROGEN PER TON OF SHALE, WITH ALCOHOL, CONTACTING THE WETTED SHALE WITH A CARBONATE SOLUBILIZING ACID AND WITH HYDROFLUORIC ACID FOR ABOUT 10 MINUTES TO 20 HOURS TO REMOVE SUBSTANTIALLY ALL THE INORGANIC MATRIX OF THE OIL SHALE, CONTACTING THE RESIDUE WITH AN ORGANIC SOLVENT CAPABLE OF EXTRACTING OIL SHALE INCLUSIONS SELECTED FROM THE GROUP CONSISTING OF BITUMENS, AMBER, COPAL, DAMMAR AND PYROPISSITE FOR A PERIOD OF ABOUT 10 MINUTES TO 20 HOURS, ADMIXING ABOUT 10 TO ABOUT 100 PARTS BY WEIGHT OF CARBON BLACK WITH 100 PARTS BY WEIGHT OF THE SOLVENT-CONTACTED RESIDUE, AND SUBJECTING THE RESULTING MIXTURE TO MOLDING PRESSURE AT A TEMPERATURE IN THE RANGE OF ABOUT 250 TO ABOUT 400*F.
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |