US2496346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive resistance provided with metal contacts
Assignee: Hartford National Bank and Trust Co
•
Filing: 1947-02-07
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Granted: 1950-02-07
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Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Haayman Pieter Willem
- 👤 Bruining Hajo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6582; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/124; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/40; C04B2237/50; C04B2237/78; C04B2237/84; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN ELECTRICAL RESISTANCE COMPRISING A BODY OF SINTERED MAGNESIA CONTAINING ABOUT 3% OF PARTICLES OF REDUCED TITANIUM OXIDE HAVING THE FORMULA TIOX WHEREIN X IS BETWEEN 1.6 AND 1.7, COPPER CONTACT MEMBERS SECURED TO SAID BODY OF SEMI-CONDUCTIVE MATERIAL, AND AN INTERMEDIATE LAYER BETWEEN SAID METAL CONTACT MEMBERS AND SAID BODY OF SEMI-CONDUCTIVE MATERIAL FOR SECURING THE METAL CONTACTS TO SAID BODY OF SEMICONDUCTIVE MATERIAL, SAID INTERMEDIATE METAL LAYER CONSISTING ESSENTIALLY OF COPPER, TITANIUM, AND TIN IN A MOLECULAR RATIO OF APPROXIMATELY 55:10:2 RESPECTIVELY.
Claim 2
Dependent Claim
84 words
AN ELECTRICAL RESISTANCE COMPRISING A BODY OF SINTERED MAGNESIA CONTAINING ABOUT 3% OF PARTICLES OF REDUCED TITANIUM OXIDE HAVING THE FORMULA TIOX WHEREIN X IS BETWEEN 1.6 AND 1.7, COPPER CONTACT MEMBERS SECURED TO SAID BODY OF SEMI-CONDUCTIVE MATERIAL, AND AN INTERMEDIATE LAYER BETWEEN SAID METAL CONTACT MEMBERS AND SAID BODY OF SEMI-CONDUCTIVE MATERIAL FOR SECURING THE METAL CONTACTS TO SAID BODY OF SEMICONDUCTIVE MATERIAL, SAID INTERMEDIATE METAL LAYER CONSISTING ESSENTIALLY OF COPPER, TITANIUM, AND TIN IN A MOLECULAR RATIO OF APPROXIMATELY 55:10:2 RESPECTIVELY.
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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |