US2741687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolytic carbon resistors
Assignee: Erie Resistor Corp
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Filing: 1953-08-21
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Granted: 1956-04-10
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Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 Toppari John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:42
CPC Classifications
H; H01; H01C; H01C7/00; H01C1/00; H01C1/02; H01C1/032; H01C1/034; H01C17/00; H01C17/06; H01C17/20; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/31504; Y10T428/31511; Y10T428/31515
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PYROLYTIC CARBON RESISTOR COMPRISING A BODY OF INSULATING MATERIAL WITH A CARBON FILM THEREON, A VARNISH COATING ON THE RESISTOR, AND AN OUTER PLASTIC CASE METHOD AROUND THE RESISTOR, SAID CASE BEING OF A PLASTIC CHEMICALLY INERT OR INACTIVE TO THE VARNISH DURING THE MOLDING OPERATION AND OF THE TYPE NOT EVOLVING WATER VAPOR DURING MOLDING.
Claim 2
Dependent Claim
57 words
A PYROLYTIC CARBON RESISTOR COMPRISING A BODY OF INSULATING MATERIAL WITH A CARBON FILM THEREON, A VARNISH COATING ON THE RESISTOR, AND AN OUTER PLASTIC CASE METHOD AROUND THE RESISTOR, SAID CASE BEING OF A PLASTIC CHEMICALLY INERT OR INACTIVE TO THE VARNISH DURING THE MOLDING OPERATION AND OF THE TYPE NOT EVOLVING WATER VAPOR DURING MOLDING.
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) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |