US4363947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating element
Assignee: Alcatel Lucent NV
•
Filing: 1981-05-20
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Granted: 1982-12-14
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Expires: 2001-05-20
Abstract
Abstract Electrical resistance strip heating element, the insulated side areas of which are mechanically reinforced in order to render the strip less sensitive to tearing. The reinforcement may be of a slightly stretchable open mask type textile web.
Inventors
- 👤 Hans A. Bergersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/36; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/005; H05B2203/014; H05B2203/017; H05B2203/033
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
Electrical resistance strip heating element comprising an electrical resistance strip, two insulation sheets between which the electrical strip is laminated, the insulation sheets having an outer periphery extending beyond the strip, and reinforcing material laminated between the insulation sheets at the outer periphery for mounting the heating element, the reinforcing material being of a slightly stretchable, open mask material through which the insulation sheets come into contact, the reinforcing material having a thickness greater than the electrical resistance strip.
Claim 2
Dependent Claim
79 words
Electrical resistance strip heating element comprising an electrical resistance strip, two insulation sheets between which the electrical strip is laminated, the insulation sheets having an outer periphery extending beyond the strip, and reinforcing material laminated between the insulation sheets at the outer periphery for mounting the heating element, the reinforcing material being of a slightly stretchable, open mask material through which the insulation sheets come into contact, the reinforcing material having a thickness greater than the electrical resistance strip.
Claim 3
Dependent Claim
20 words
The heating element according to claim 1 wherein said insulation sheets is transparent and said reinforcing material has a color.
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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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |