US2776210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing porous oil shale products
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1953-12-07
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Granted: 1957-01-01
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Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Harold E Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:43
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C04B35/00; C04B35/01; C04B35/16; C04B35/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A PROCESS OF PRODUCING A POROUS, NON-BRITTLE HOMOGENOUS, GRAINLESS BUILDING MATERIAL STRUCTURE THE STEPS OF: (A) GRINDING OIL SHALE TO A PARTICLE SIZE IN THE RANGE OF ABOUT 20-100 MICRONS; (B) COMPRESSING THE PARTICLES OF OIL SHALE WITH SODIUM SILICATE BINDER WHILE HEATING THE SAME TO FORM A BRICK-LIKE BODY; (C) EVACUATING AND HEATING A CLOSED SPACING WITH THE BRICK-LIKE BODY THEREIN; (D) FLUSHING THE SPACING WITH CARBON DIOXIDE; (E) RAISING THE TEMPERATURE WITHIN THE SPACING SUFFICIENTLY TO DISTILL OFF VOLATILES OF THE FORMED BODY OF THE SHALE; AND (F) SINTERING THE MATERIAL AFTER COMPLETION OF THE DISTILLATION.
Claim 2
Dependent Claim
99 words
IN A PROCESS OF PRODUCING A POROUS, NON-BRITTLE HOMOGENOUS, GRAINLESS BUILDING MATERIAL STRUCTURE THE STEPS OF: (A) GRINDING OIL SHALE TO A PARTICLE SIZE IN THE RANGE OF ABOUT 20-100 MICRONS; (B) COMPRESSING THE PARTICLES OF OIL SHALE WITH SODIUM SILICATE BINDER WHILE HEATING THE SAME TO FORM A BRICK-LIKE BODY; (C) EVACUATING AND HEATING A CLOSED SPACING WITH THE BRICK-LIKE BODY THEREIN; (D) FLUSHING THE SPACING WITH CARBON DIOXIDE; (E) RAISING THE TEMPERATURE WITHIN THE SPACING SUFFICIENTLY TO DISTILL OFF VOLATILES OF THE FORMED BODY OF THE SHALE; AND (F) SINTERING THE MATERIAL AFTER COMPLETION OF THE DISTILLATION.
References Cited (Backward Citations)
US1583521A
Cited
DE388662C
Cited
DE385624C
Cited
DE439464C
Cited
GB413238A
Cited
US2099342A
Cited
US2543987A
Cited
US2603570A
Cited
US2627642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |