US3212865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite electrically conductive spring materials
Assignee: Texas Instruments Inc
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Filing: 1962-06-13
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Granted: 1965-10-19
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Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 Edwin A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/013; B32B15/015; H; H01; H01B; H01B1/00; H01B1/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12438; Y10T428/12493; Y10T428/12632; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
COMPOSITE ELECTRICALLY CONDUCTIVE SPRING MATERIAL COMPRISING A PLURALITY OF SOLID-PHASE BONDED METALLIC LAYERS COMPRISING A CENTRALLY LOCATED COPPER LAYER SANDWICH BETWEEN A PAIR OF LAYERS FORMED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF HARDENABLE CARBON SPRING STEEL AND HARDENABLE LOW ALLOY SPRING STEEL AND A PAIR OF EXPOSED LAYERS SELECTED FROM THE GROUP CONSISTING OF COPPER AND NICKEL, EACH COATING A RESPECTIVE ONE OF SAID STEEL LAYERS; SAID CENTRALLY LOCATED COPPER LAYER COMPRISING APPROXIMATELY 35-45% OF THE OVERALL THICKNESS OF SAID COMPOSITE MATERIAL; EACH OF SAID STEEL LAYERS COMPRISING APPROXIMATELY 23-33% OF THE OVERAL THICKNESS OF SAID COMPOSITE MATERIAL AND EACH OF SAID PAIR OF EXPOSED LAYERS COMPRISING APPROXIMATELY 1-3% OF THE OVERALL THICKNESS OF SAID COMPOSITE MATERIAL.
Claim 2
Dependent Claim
120 words
COMPOSITE ELECTRICALLY CONDUCTIVE SPRING MATERIAL COMPRISING A PLURALITY OF SOLID-PHASE BONDED METALLIC LAYERS COMPRISING A CENTRALLY LOCATED COPPER LAYER SANDWICH BETWEEN A PAIR OF LAYERS FORMED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF HARDENABLE CARBON SPRING STEEL AND HARDENABLE LOW ALLOY SPRING STEEL AND A PAIR OF EXPOSED LAYERS SELECTED FROM THE GROUP CONSISTING OF COPPER AND NICKEL, EACH COATING A RESPECTIVE ONE OF SAID STEEL LAYERS; SAID CENTRALLY LOCATED COPPER LAYER COMPRISING APPROXIMATELY 35-45% OF THE OVERALL THICKNESS OF SAID COMPOSITE MATERIAL; EACH OF SAID STEEL LAYERS COMPRISING APPROXIMATELY 23-33% OF THE OVERAL THICKNESS OF SAID COMPOSITE MATERIAL AND EACH OF SAID PAIR OF EXPOSED LAYERS COMPRISING APPROXIMATELY 1-3% OF THE OVERALL THICKNESS OF SAID COMPOSITE MATERIAL.
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |