US3178665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating element
Assignee: GTE Sylvania Inc
•
Filing: 1962-08-27
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Granted: 1965-04-13
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Wilfrid G Matheson
- 👤 James P Clune
- 👤 Theodore J Pricenski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:49
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06; H05B3/40; H05B3/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
48 words
AN ELECTRICAL HEATING ELEMENT COMPRISING: AN ELONGATED, FORAMINOUS PLEXUS OF AN INTERTWISTED SERIES OF HELICAL CONVOLUTIONS OF REFRACTORY METAL WIRES, THE TURNS OF ONE OF SAID CONVOLUTIONS BEING HELD BY THE TURNS OF AND ADJACENT CONVOLUTION; MEANS FOR CONNECTING THE ENDS OF SAID PLEXUS TO A POWER SUPPLY.
References Cited (Backward Citations)
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US1965542A
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Cited
US2884509A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |