Patent US3307136A successfully refreshed from Google Patents.
US3307136A
Expired / Lapsed
US
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Contact layer for a siliconcontaining material
Assignee: Siemens Plania Werke AG
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Filing: 1966-06-21
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Granted: 1967-02-28
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Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 Fitzer Erich
- 👤 Rubisch Ottmar
- 👤 Selka Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:38
CPC Classifications
H; H01; H01B; H01B1/00; H05; H05B; H05B3/00; H05B3/02; H05B3/06; H05B3/10; H05B3/12; H05B3/14; H05B3/141; H05B3/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
AN ELECTRIC RESISTANCE HEATER ELEMENT COMPRISING A ROD-SHAPED RESISTOR BODY OF REFRACTORY METAL-SILICIDE HAVING RESPECTIVCE TERMINAL CONTACTS ON THE RESPECTIVE END PORTIONS OF THE BODY, SAID END PORTIONS HAVING AT LEAST ONE INWARDLY CONCAVE RECESS, A METALLIZATION COATING OF ALUMINUM ON SAID END PORTIONS, SAID METALLIZATION COATING FORMING AN INTIMATE AND OXIDE-FREE AREA BOND WITH THE SILICIDE SURFACE OF SAID BODY AND HAVING A THICKNESS OF ABOUT 0.1 TO ABOUT 0.5 MM., A THICKER OUTER CAST COATING OF ALUMINUM INTEGRAL TO SAID METALLIZED COATING, SAID COATINGS HAVING INWARDLY
Claim 2
Dependent Claim
88 words
AN ELECTRIC RESISTANCE HEATER ELEMENT COMPRISING A ROD-SHAPED RESISTOR BODY OF REFRACTORY METAL-SILICIDE HAVING RESPECTIVCE TERMINAL CONTACTS ON THE RESPECTIVE END PORTIONS OF THE BODY, SAID END PORTIONS HAVING AT LEAST ONE INWARDLY CONCAVE RECESS, A METALLIZATION COATING OF ALUMINUM ON SAID END PORTIONS, SAID METALLIZATION COATING FORMING AN INTIMATE AND OXIDE-FREE AREA BOND WITH THE SILICIDE SURFACE OF SAID BODY AND HAVING A THICKNESS OF ABOUT 0.1 TO ABOUT 0.5 MM., A THICKER OUTER CAST COATING OF ALUMINUM INTEGRAL TO SAID METALLIZED COATING, SAID COATINGS HAVING INWARDLY
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |