Patent US3280231A successfully refreshed from Google Patents.
US3280231A
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Method for manufacture of low permeability carbonaceous products
Assignee: Pechiney SA
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Filing: 1964-02-20
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Granted: 1966-10-18
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Bentolila Jacques
- 👤 Cornuault Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C01; C01B; C01B32/00; C04B35/528; C04B35/532; C04B35/56; F; F16; F16L; F16L59/00; F16L59/02; C04B2235/00; C04B2235/60; C04B2235/602; C04B2235/6021; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/70; C04B2235/74; C04B2235/77; C04B2235/96; C04B2235/9607; C04B2235/9615; Y; Y10; Y10S; Y10S403/00; Y10S403/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCESS FOR THE MANUFACTURE OF CARBONACEOUS PRODUCTS HAVING LOW PERMEABILITY TO LIQUIDS AND GASES, THE STEPS OF FORMING TO THE SHAPE OF THE DESIRED PRODUCT A MIXTURE OF A CARBONACEOUS BINDER AND A CARBONACEOUS MATERIAL IN WHICH THE CARBONACEOUS MATERIAL CONSISTS ESSENTIALLY OF GRAPHITE DUST OF A PARTICLE SIZE BETWEEN 0.5 AND 400 MICRONS AND PREVIOUSLY GRAPHITIzED CARBON BLACK OF A PARTICLE SIZE BETWEEN 0.5 AND 0.005 MICRON, SAID GRAPHITIZED CARBON BLACK MAKING UP 10% TO 50% BY WEIGHT OF THE CARBONACEOUS MATERIAL AND BAKING THE SHAPED PRODUCT.
Claim 2
Dependent Claim
90 words
IN A PROCESS FOR THE MANUFACTURE OF CARBONACEOUS PRODUCTS HAVING LOW PERMEABILITY TO LIQUIDS AND GASES, THE STEPS OF FORMING TO THE SHAPE OF THE DESIRED PRODUCT A MIXTURE OF A CARBONACEOUS BINDER AND A CARBONACEOUS MATERIAL IN WHICH THE CARBONACEOUS MATERIAL CONSISTS ESSENTIALLY OF GRAPHITE DUST OF A PARTICLE SIZE BETWEEN 0.5 AND 400 MICRONS AND PREVIOUSLY GRAPHITIzED CARBON BLACK OF A PARTICLE SIZE BETWEEN 0.5 AND 0.005 MICRON, SAID GRAPHITIZED CARBON BLACK MAKING UP 10% TO 50% BY WEIGHT OF THE CARBONACEOUS MATERIAL AND BAKING THE SHAPED PRODUCT.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |