Patent US805664A successfully refreshed from Google Patents.
Patent US3210831A successfully refreshed from Google Patents.
US3210831A
Expired / Lapsed
US
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Method of making a non-linear resistance element
Assignee: Associated Electrical Industries Ltd
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Filing: 1962-11-26
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Granted: 1965-10-12
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Expires: 1982-11-26
Abstract
No abstract record available.
Inventors
- 👤 Johnson Frederick Lawrence
- 👤 Needham William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:41
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/118; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF MANUFACTURING A NON-LINEAR RESISTANCE ELEMENT COMPRISING THE STEPS OF CONSTRAINING A SINGLE LAYER OF DISCRETE GRANULES OF A NON-LINEAR RESISTANCE MATERIAL IN A LAMINA OF ELECTRICALLY INSULATING MATERIAL WHICH IS SUFFICIENTLY THIN SO THAT EACH OF AT LEAST A SUBSTANTIAL NUMBER OF SAID DISCRETE GRANULES IS EXPOSED AT BOTH SURFACES OF THE LAMINA, AND APPLYING AN ELECTRICALLY CONDUCTIVE MEMBER TO EACH OF THESE SURFACES TO CONTACT EXPOSED PORTIONS OF THE GRANULES THEREAT, WHEREIN SAID LAMINA WITH SAID SINGLE LAYER OF DISCRETE GRANULES CONSTRAINED THEREIN IS PREPARED BY HOLDING A SINGLE LAYER OF THE GRANULES UNDER PRESSURE BETWEEN TWO SUPPORTING SURFACES OF RESILIENT MATERIAL, THE PRESSURE BEING SUCH THAT PORTIONS OF OPPOSITELY FACING SURFACES OF EACH OF AT LEAST A SUBSTANTIAL NUMBER OF THE GRANULES ARE EMBEDED IN THE SUPPORTING SURFACES, DEPOSITING RESINOUS MATERIAL ROUND THE GRANULES, CAUSING THE RESINOUS MATERIAL TO SET TO FORM THE LAMINA WITH THE GRANULES PARTIALLY EMBEDDED THEREIN, AND REMOVING THE SUPPORTING SURFACES TO LEAVE THOSE PORTIONS OF THE GRANULES WHICH WERE PRESSED INTO THEM EXPOSED ON OPPOSITE SIDES OF THE LAMINA.
Claim 2
Independent Claim
179 words
A METHOD OF MANUFACTURING A NON-LINEAR RESISTANCE ELEMENT COMPRISING THE STEPS OF CONSTRAINING A SINGLE LAYER OF DISCRETE GRANULES OF A NON-LINEAR RESISTANCE MATERIAL IN A LAMINA OF ELECTRICALLY INSULATING MATERIAL WHICH IS SUFFICIENTLY THIN SO THAT EACH OF AT LEAST A SUBSTANTIAL NUMBER OF SAID DISCRETE GRANULES IS EXPOSED AT BOTH SURFACES OF THE LAMINA, AND APPLYING AN ELECTRICALLY CONDUCTIVE MEMBER TO EACH OF THESE SURFACES TO CONTACT EXPOSED PORTIONS OF THE GRANULES THEREAT, WHEREIN SAID LAMINA WITH SAID SINGLE LAYER OF DISCRETE GRANULES CONSTRAINED THEREIN IS PREPARED BY HOLDING A SINGLE LAYER OF THE GRANULES UNDER PRESSURE BETWEEN TWO SUPPORTING SURFACES OF RESILIENT MATERIAL, THE PRESSURE BEING SUCH THAT PORTIONS OF OPPOSITELY FACING SURFACES OF EACH OF AT LEAST A SUBSTANTIAL NUMBER OF THE GRANULES ARE EMBEDED IN THE SUPPORTING SURFACES, DEPOSITING RESINOUS MATERIAL ROUND THE GRANULES, CAUSING THE RESINOUS MATERIAL TO SET TO FORM THE LAMINA WITH THE GRANULES PARTIALLY EMBEDDED THEREIN, AND REMOVING THE SUPPORTING SURFACES TO LEAVE THOSE PORTIONS OF THE GRANULES WHICH WERE PRESSED INTO THEM EXPOSED ON OPPOSITE SIDES OF THE LAMINA.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |