Patent US3261892A successfully refreshed from Google Patents.
US3261892A
Expired / Lapsed
US
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Method of producing hardened bodies from bituminous mixes
Assignee: STRABA HANDELS AG
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Filing: 1962-04-09
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Granted: 1966-07-19
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Sommer Albert
- 👤 Schulze Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/04; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C04B35/622; C04B35/626; C04B35/62605; C04B35/6269; C04B35/628; C04B35/62802; C04B35/62828; C04B35/62839; C25; C25C; C25C7/00; C25C7/02; C25C7/025; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/42; C04B2235/422; C04B2235/60; C04B2235/602; C04B2235/6021; C04B2235/70; C04B2235/74; C04B2235/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS FOR THE PRODUCTION OF CARBON ELECTRODES HAVING UNIFORMLY DISTRIBUTED AIR SPACES CONSTITUTING FROM 5 TO 15% BY VOLUME OF THE ELECTRODE WHICH COMPRISES MIXING GRANULAR TO PULVERULENT CARBON PARTICLES, SPRAYING SAID PARTICLES WITH LIQUID BITUMEN UNTIL EACH PARTICLE IS INDIVIDUALLY COATED WITH BITUMEN, MOLDNG THE SO-OBTAINED MIXTURE AT A TEMPERATURE OF BETWEEN 150* TO 170*C. SO THAT MIXTURE OF CARBON PARTICLES AND BITUMEN HAS UNIFORMLY DISTRIBUTED AIR SPACES CONSTITUTING FROM 5 TO 15% BY VOLUME, PLACING THE HEATED MOLDED ARTICLE IN A HEATING APPARATUS AT A TEMPERATURE OF ABOU 170*C. WHEREBY AN EXOTHERMIC REACTION TAKES PLACE IN THE MOLDED ARTICLE THEREBY RAISING THE TEMPERATURE OF SAID ARTICLE, ALLOWING THE TEMPERATURE TO RISE TO ABOUT 300*C. AND MAINTAINING THE ELETRODE AT THIS TEMPERATURE BY SUPPLYING OXYGEN AND BAKING THE ELECTRODE AT SAID TEMPERATURE.
Claim 2
Dependent Claim
134 words
A PROCESS FOR THE PRODUCTION OF CARBON ELECTRODES HAVING UNIFORMLY DISTRIBUTED AIR SPACES CONSTITUTING FROM 5 TO 15% BY VOLUME OF THE ELECTRODE WHICH COMPRISES MIXING GRANULAR TO PULVERULENT CARBON PARTICLES, SPRAYING SAID PARTICLES WITH LIQUID BITUMEN UNTIL EACH PARTICLE IS INDIVIDUALLY COATED WITH BITUMEN, MOLDNG THE SO-OBTAINED MIXTURE AT A TEMPERATURE OF BETWEEN 150* TO 170*C. SO THAT MIXTURE OF CARBON PARTICLES AND BITUMEN HAS UNIFORMLY DISTRIBUTED AIR SPACES CONSTITUTING FROM 5 TO 15% BY VOLUME, PLACING THE HEATED MOLDED ARTICLE IN A HEATING APPARATUS AT A TEMPERATURE OF ABOU 170*C. WHEREBY AN EXOTHERMIC REACTION TAKES PLACE IN THE MOLDED ARTICLE THEREBY RAISING THE TEMPERATURE OF SAID ARTICLE, ALLOWING THE TEMPERATURE TO RISE TO ABOUT 300*C. AND MAINTAINING THE ELETRODE AT THIS TEMPERATURE BY SUPPLYING OXYGEN AND BAKING THE ELECTRODE AT SAID TEMPERATURE.
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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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |