US2682483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heater and method of making same
Assignee: Radio Ceramics Corp
•
Filing: 1950-06-22
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Granted: 1954-06-29
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Expires: 1970-06-22
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Erbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN ELECTRICAL HEATING ELEMENT COMPRISING A FLEXIBLE SHEET OF INSULATING HEAT-RESISTANT MATERIAL AND A FILM OF A DRIED MIXTURE CONSISTING OF COLLOIDAL GRAPHITE AND COLLOIDAL SILVER FIXEDLY ADHERED TO SAID SHEET, SAID MIXTURE BEING STABILIZED AGAINST CHANGE IN RESISTANCE AS A RESULT OF CHANGES IN AMBIENT TEMPERATURE.
Claim 2
Dependent Claim
47 words
AN ELECTRICAL HEATING ELEMENT COMPRISING A FLEXIBLE SHEET OF INSULATING HEAT-RESISTANT MATERIAL AND A FILM OF A DRIED MIXTURE CONSISTING OF COLLOIDAL GRAPHITE AND COLLOIDAL SILVER FIXEDLY ADHERED TO SAID SHEET, SAID MIXTURE BEING STABILIZED AGAINST CHANGE IN RESISTANCE AS A RESULT OF CHANGES IN AMBIENT TEMPERATURE.
References Cited (Backward Citations)
US952901A
Cited
US1037469A
Cited
FR440119A
Cited
US2177484A
Cited
US2196128A
Cited
US2301882A
Cited
US2280135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |