US2683673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-type heating element
Assignee: Electrofilm Corp
•
Filing: 1952-03-10
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Granted: 1954-07-13
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Expires: 1972-03-10
Abstract
No abstract record available.
Inventors
- 👤 Herman I Silversher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:15
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/54; H05B3/56; H05B3/565; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A HEATING ELEMENT COMPRISING A UNIFORM MIXTURE OF FINELY DIVIDED METALLIC ELECTRICALLY CONDUCTIVE PARTICLES AND RELATIVELY HIGH ELECTRICALLY RESISTIVE FILLER PARTICLES ALL BONDED TOGETHER IN PROXIMATE AND CURRENT-PASSING RELATION BY A HEAT RESISTANT ELASTOMER OF COPOLYMERIZED POLY SILOXANEOUS, AND A SUPPORTING MEMBER BONDED TO SAID ELEMENT AND COMPOSED OF A HEAT RESISTANT ELASTOMER OF COPOLYMERIZED POLY SILOXANES.
Claim 2
Dependent Claim
57 words
A HEATING ELEMENT COMPRISING A UNIFORM MIXTURE OF FINELY DIVIDED METALLIC ELECTRICALLY CONDUCTIVE PARTICLES AND RELATIVELY HIGH ELECTRICALLY RESISTIVE FILLER PARTICLES ALL BONDED TOGETHER IN PROXIMATE AND CURRENT-PASSING RELATION BY A HEAT RESISTANT ELASTOMER OF COPOLYMERIZED POLY SILOXANEOUS, AND A SUPPORTING MEMBER BONDED TO SAID ELEMENT AND COMPOSED OF A HEAT RESISTANT ELASTOMER OF COPOLYMERIZED POLY SILOXANES.
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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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |