Patent US3155758A successfully refreshed from Google Patents.
US3155758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating elements for vacuum furnaces
Assignee: ABAR IPSEN INDUSTRIES A NY LP
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Filing: 1962-06-14
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Granted: 1964-11-03
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Expires: 1982-06-14
Abstract
No abstract record available.
Inventors
- 👤 Charles A S Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:33
CPC Classifications
H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A RESISTANCE HEATING ELEMENT FOR FURNACE COMPOSED OF A HIGH TEMPERATURE REFRACTORY METAL AND HAVING A PLURALITY OF SECTIONS WITH HORIZONTAL BOTTOM WALL PORTIONS AND OPPOSITE FLAT VERTICAL SIDE WALL PORTIONS FREE FROM EXPANSIVE RESTRAINT, AND ELECTRICALLY CONDUCTING SUPPORTING MEMBERS AT THE TOP OF EACH OF THE SIDE WALL PORTIONS AND EXTENDING HORIZONTALLY OUTWARDLY THEREFROM AND SUPPORTING SAID SIDE WALL PORTION FREE FROM VERTICAL AND HORIZONTAL RESTRAINT.
Claim 2
Dependent Claim
67 words
A RESISTANCE HEATING ELEMENT FOR FURNACE COMPOSED OF A HIGH TEMPERATURE REFRACTORY METAL AND HAVING A PLURALITY OF SECTIONS WITH HORIZONTAL BOTTOM WALL PORTIONS AND OPPOSITE FLAT VERTICAL SIDE WALL PORTIONS FREE FROM EXPANSIVE RESTRAINT, AND ELECTRICALLY CONDUCTING SUPPORTING MEMBERS AT THE TOP OF EACH OF THE SIDE WALL PORTIONS AND EXTENDING HORIZONTALLY OUTWARDLY THEREFROM AND SUPPORTING SAID SIDE WALL PORTION FREE FROM VERTICAL AND HORIZONTAL RESTRAINT.
References Cited (Backward Citations)
US1945393A
Cited
US2223617A
Cited
US2694740A
Cited
US3033547A
Cited
US2945756A
Cited
US3057936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |