Patent US3654179A successfully refreshed from Google Patents.
US2739083A
Expired / Lapsed
US
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Electrically conductive material
Assignee: Bjorksten Research Laboratories Inc
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Filing: 1951-11-08
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Granted: 1956-03-20
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Expires: 1971-11-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Edgar H Brown
- 👤 Encel H Dodge
- 👤 Johan A Bjorksten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:07
CPC Classifications
H; H01; H01C; H01C7/00; Y; Y10; Y10T; Y10T428/00; Y10T428/20; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31859
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
AN ARTICLE OF MANUFACTURE COMPRISING A NON-CONDUCTING SUBSTANCE HAVING FINE SURFACE SCRATCHES, SAID SCRATCHES BEING FILLED WITH ELECTRICALLY CONDUCTING SOLIDS, SO AS TO IMPART TO THE SAID ARTICLE A SURFACE RESISTANCE IN THE RANGE OF 10 OHMS TO 1000 MEGOHMS, BEING FURTHER COVERED BY A THIN FILM COMPRISING A POLYELECTROLYTE AND ADHERENT TO THE SAID BASE MATERIAL.
Claim 2
Dependent Claim
57 words
AN ARTICLE OF MANUFACTURE COMPRISING A NON-CONDUCTING SUBSTANCE HAVING FINE SURFACE SCRATCHES, SAID SCRATCHES BEING FILLED WITH ELECTRICALLY CONDUCTING SOLIDS, SO AS TO IMPART TO THE SAID ARTICLE A SURFACE RESISTANCE IN THE RANGE OF 10 OHMS TO 1000 MEGOHMS, BEING FURTHER COVERED BY A THIN FILM COMPRISING A POLYELECTROLYTE AND ADHERENT TO THE SAID BASE MATERIAL.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |