Patent US3149002A successfully refreshed from Google Patents.
US3149002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrical resistance element
Assignee: Beckman Coulter Inc
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Filing: 1960-03-04
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Granted: 1964-09-15
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Expires: 1980-03-04
Abstract
No abstract record available.
Inventors
- 👤 Sr Thomas M Place
- 👤 Jr Thomas M Place
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:24
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A METHOD OF MANUFACTURING AN ELECTRICAL RESISTANCE ELEMENT, THE STEPS OF: FORMING A MIXTURE CONTAINING A FINELY GROUND GLASS AND A SOLUTION OF AT LEAST ONE NOBLE METAL-ORGANIC COMPOUND; APPLYING A LAYER OF THE MIXTURE TO A HIGH-TEMPERATURE-RESISTANT NONCONDUCTING BASE; HEATING THE BASE AND LAYER TO AN INTERMEDIATE TEMPERATURE TO REDUCE THE METAL-ORGANIC COMPOUNDS AND TO REMOVE THE VOLATILES AND ORGANIC MATERIAL THEREIN; ADDITIONALLY HEATING THE BASE AND LAYER TO A PREDETERMINED TEMPERTURE AT LEAST AS HIGH AS THE MELTING POINT OF THE GLASS BUT LESS THAN THE MELTING POINT OF SUCH NOBLE METAL TO PRODUCE A CONTINUOUS GLASS PHASE HAVING A SMOOTH SURFACE WITH THE METAL UNIFORMLY DISPERSED THERETHROUGH; AND COOLING THE LAYER TO A HARDENED STATE.
Claim 2
Dependent Claim
119 words
IN A METHOD OF MANUFACTURING AN ELECTRICAL RESISTANCE ELEMENT, THE STEPS OF: FORMING A MIXTURE CONTAINING A FINELY GROUND GLASS AND A SOLUTION OF AT LEAST ONE NOBLE METAL-ORGANIC COMPOUND; APPLYING A LAYER OF THE MIXTURE TO A HIGH-TEMPERATURE-RESISTANT NONCONDUCTING BASE; HEATING THE BASE AND LAYER TO AN INTERMEDIATE TEMPERATURE TO REDUCE THE METAL-ORGANIC COMPOUNDS AND TO REMOVE THE VOLATILES AND ORGANIC MATERIAL THEREIN; ADDITIONALLY HEATING THE BASE AND LAYER TO A PREDETERMINED TEMPERTURE AT LEAST AS HIGH AS THE MELTING POINT OF THE GLASS BUT LESS THAN THE MELTING POINT OF SUCH NOBLE METAL TO PRODUCE A CONTINUOUS GLASS PHASE HAVING A SMOOTH SURFACE WITH THE METAL UNIFORMLY DISPERSED THERETHROUGH; AND COOLING THE LAYER TO A HARDENED STATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |