US3274669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrical resistance element
Assignee: Beckman Coulter Inc
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Filing: 1964-12-31
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Granted: 1966-09-27
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Sr Thomas M Place
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:15
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD OF MAKING A RESISTANCE ELEMENT, INCLUDING THE STEPS OF: APPLYING A METALLIC PASTE TO A NONCONDUCTIVE SUPPORT STRUCTURE IN A THIN LAYER TO DEFINE A TERMINAL; HEATING THE UNIT TO A FIRST TEMPERATURE TO CONVERT THE PASTE TO A METAL LAYER ADHERED TO THE SUPPORT STRUCTURE; APPLYING A CERMENT RESISTANCE MATERIAL MIXTURE TO THE SUPPORT STRUCTURE IN A FIRST FILM, WITH THE FILM COVERING A PORTION OF THE METAL LAYER AND HAVING A GAP THEREIN; APPLYING A CERMENT RESISTANCE MATERIAL MIXTURE WITH A REFRACTORY OXIDE ADDITIVE THEREIN TO RENDER SAID MIXTURE NONCONDUCTIVE TO THE SUPPORT STRUCTURE IN A SECOND FILM AND BRIDGING THE GAP IN THE FIRST FILM; AND HEATING THE UNIT TO A SECOND TEMPERATURE LOWER THAN THE FIRST TEMPERATURE AND LOWER THAN THE MELTING POINT OF THE METALLIC CONSITITUENTS OF THE MIXTURES AND EXCEEDING THE MELTING POINT OF THE GLASS CONSTITUENTS OF THE MIXTURE TO PRODUCE A CONTINUOUS GLASSY AND SUBSTANTIALLY FLAT SURFACE.
Claim 2
Independent Claim
157 words
A METHOD OF MAKING A RESISTANCE ELEMENT, INCLUDING THE STEPS OF: APPLYING A METALLIC PASTE TO A NONCONDUCTIVE SUPPORT STRUCTURE IN A THIN LAYER TO DEFINE A TERMINAL; HEATING THE UNIT TO A FIRST TEMPERATURE TO CONVERT THE PASTE TO A METAL LAYER ADHERED TO THE SUPPORT STRUCTURE; APPLYING A CERMENT RESISTANCE MATERIAL MIXTURE TO THE SUPPORT STRUCTURE IN A FIRST FILM, WITH THE FILM COVERING A PORTION OF THE METAL LAYER AND HAVING A GAP THEREIN; APPLYING A CERMENT RESISTANCE MATERIAL MIXTURE WITH A REFRACTORY OXIDE ADDITIVE THEREIN TO RENDER SAID MIXTURE NONCONDUCTIVE TO THE SUPPORT STRUCTURE IN A SECOND FILM AND BRIDGING THE GAP IN THE FIRST FILM; AND HEATING THE UNIT TO A SECOND TEMPERATURE LOWER THAN THE FIRST TEMPERATURE AND LOWER THAN THE MELTING POINT OF THE METALLIC CONSITITUENTS OF THE MIXTURES AND EXCEEDING THE MELTING POINT OF THE GLASS CONSTITUENTS OF THE MIXTURE TO PRODUCE A CONTINUOUS GLASSY AND SUBSTANTIALLY FLAT SURFACE.
References Cited (Backward Citations)
US2606985A
Cited
US2908852A
Cited
US2950995A
Cited
US3149002A
Cited
US2950996A
Cited
US3052573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |