Patent US3035308A successfully refreshed from Google Patents.
US3035308A
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US
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Production of graphitizable pitch coke and graphite products
Assignee: Siemens Plania Werke AG
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Filing: 1958-01-23
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Granted: 1962-05-22
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Expires: 1978-01-23
Abstract
No abstract record available.
Inventors
- 👤 Ragoss Alfred
- 👤 Fitzer Erich
- 👤 Nedopil Erich
- 👤 Buhmann Anni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:39
CPC Classifications
C; C10; C10B; C10B55/00; C01; C01B; C01B32/00; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
THE METHOD OF TRANSFORMING COAL TAR AND COAL-TAR PITCH INTO A READILY GRAPHITIZABLE PITCH COKE AND THE MANUFACTURE FROM THE LATTER OF ELECTRICALLY GOOD CONDUCTING GRAPHITE ELECTRODES, WHICH COMPRISES SEPARATING FROM THE RAW MATERIAL ALL SOOTY AND OTHER CONSTITUENTS WHICH ARE NON-MELTABLE BELOW A TEMPERATURE OF 340*C. AND INSOLUBLE IN ORGANIC PITCH-DISSOLVING AGENTS, SAID PITCH-DISSOLVING AGENTS BEING SELECTED FROM THE GROUP CONSISTING OF BENZOL, TOLUOL, CHLORBENZOL, O-DICHLOR-BENZOL, DICHLORBENZOL ANTHRACENE OIL, PYDRIDINE, CHINOLINE AND A LIQUID TAR-DISTILLATION PRODUCT HAVING A BOILING POINT BELOW 340* C., SAID CONSTITUENTS BEING PREDOMINANTLY-HETEROCYCLI-
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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) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |