US3140967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a cemented carbon electrode joint
Assignee: Siemens Plania Werke AG
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Filing: 1960-04-27
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Granted: 1964-07-14
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 Waldemar Kaufmann
- 👤 Erich Fitzer
- 👤 Hans-Joachim Pfleiderer
- 👤 Alfred Pelz
- 👤 Wilfried Hub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:03
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/225; H; H05; H05B; H05B7/00; H05B7/02; H05B7/14; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10S; Y10S285/00; Y10S285/915; Y10S403/00; Y10S403/05; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/93; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885; Y10T29/49947; Y10T29/49963; Y10T29/49964; Y10T29/49966; Y10T29/4997; Y10T403/00; Y10T403/47; Y10T403/472; Y10T403/55; Y10T403/556
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF SYMMETRICALLY AND COAXIALLY RELEASABLY JOINING TWO CARBON ELECTRODES COMPRISING (1) FORMING A DOUBLE-CONICAL THREADED NIPPLE PLUG HAV ING AN EQUATOR PORTION MIDWAY BETWEEN ITS ENDS. (2) PROPORTIONING THE DISTANCE FROM THE EQUATOR PORTION TO EACH OF SAID NIPPLE PLUG ENDS A PREDETERMINED SELECTED DISTANCE, (3) FORMING IN THE OPPOSING FACES OF SAID ELECTRODES THREADED FEMALE CONICAL SOCKET PORTIONS EACH HAVING A PREDETERMINED DEPTH GREATER THAN SAID PREDETERMINED DISTANCE OF SAID NIPPLE PLUG,, (4) FORMING THE DIAMETER OF SAID EQUATOR PORTION SUBSTANTIALLY EQUAL TO THE GREATEST DIAMETER OF SAID SOCKET PORTIONS, (5) PROVIDING A THERMALLY HARDENABLE CEMENT OF SELECTED CHEMICAL PROPERTIES AND CONTAINING A CARBONIZABLE SUBSTANCE, (6) ENCASING A MEASURED DOSAGE OF SAID CEMENT IN A FLACCID AND READILY DEFORMABLE PLASTIC ENVELOPE, AND ALSO INSERTING IN SAID ENVELOPE A NORMALLY INACTIVE SWELLING AGENT ACTIVATABLE BY HEAT AND BEING THERMALLY DECOMPOSABLE TO EVOLVE A HARDENING CATALYST FOR SAID CEMENT.
Claim 2
Independent Claim
150 words
THE METHOD OF SYMMETRICALLY AND COAXIALLY RELEASABLY JOINING TWO CARBON ELECTRODES COMPRISING (1) FORMING A DOUBLE-CONICAL THREADED NIPPLE PLUG HAV ING AN EQUATOR PORTION MIDWAY BETWEEN ITS ENDS. (2) PROPORTIONING THE DISTANCE FROM THE EQUATOR PORTION TO EACH OF SAID NIPPLE PLUG ENDS A PREDETERMINED SELECTED DISTANCE, (3) FORMING IN THE OPPOSING FACES OF SAID ELECTRODES THREADED FEMALE CONICAL SOCKET PORTIONS EACH HAVING A PREDETERMINED DEPTH GREATER THAN SAID PREDETERMINED DISTANCE OF SAID NIPPLE PLUG,, (4) FORMING THE DIAMETER OF SAID EQUATOR PORTION SUBSTANTIALLY EQUAL TO THE GREATEST DIAMETER OF SAID SOCKET PORTIONS, (5) PROVIDING A THERMALLY HARDENABLE CEMENT OF SELECTED CHEMICAL PROPERTIES AND CONTAINING A CARBONIZABLE SUBSTANCE, (6) ENCASING A MEASURED DOSAGE OF SAID CEMENT IN A FLACCID AND READILY DEFORMABLE PLASTIC ENVELOPE, AND ALSO INSERTING IN SAID ENVELOPE A NORMALLY INACTIVE SWELLING AGENT ACTIVATABLE BY HEAT AND BEING THERMALLY DECOMPOSABLE TO EVOLVE A HARDENING CATALYST FOR SAID CEMENT.
References Cited (Backward Citations)
US1743888A
Cited
US2093390A
Cited
US2421105A
Cited
US2510230A
Cited
US2684318A
Cited
GB739013A
Cited
US2829502A
Cited
US2805879A
Cited
US2894776A
Cited
US2836806A
Cited
US2952129A
Cited
US3048433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |