US3234633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a sheathed electric heating unit
Assignee: General Electric Co
•
Filing: 1962-09-28
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Granted: 1966-02-15
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Robert D Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:26
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; F; F23; F23Q; F23Q7/00; F23Q7/001; H05B3/52; F23Q2007/004; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49089; Y10T29/49101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF MAKING A SHEATHED HEATING UNIT COMPRISING THE STEPS OF: (A) ATTACHING A GENERALLY HOLLOW OPEN-ENDED UNEXTENDED HELICAL HEATING ELEMENT TO A TERMINAL HAVING A DUCT WHICH COMMUNICATES WITH THE INTERIOR OF THE ELEMENT TO FORM A HEATER ASSEMBLY, (B) INSERTING SAID ASSEMBLY IN A SHEATH, (C) PLACING AT LEAST A PORTION OF A FRANGIBLE CYLINDRICAL MEMBER OF INSULATING MATERIAL BETWEEN THE INNER WALL OF THE SHEATH AND THE HEATING ELEMENT TO CENTER THE HEATING ELEMENT WITH RESPECT TO THE SHEATH, (D) CLOSING ONE END OF SAID SHEATH, (E) INTRODUCING INSULATING MATERIAL THROUGH SAID DUCT OF SAID TERMINAL INTO THE INTERIOR OF SAID ELEMENT, (F) CLOSING THE OTHER END OF SAID SHEATH, AND (G) COMPRESSING THE UNIT TO EXTEND SAID HEATING ELEMENT AND COMPACT SAID INSULATING MATERIAL.
Claim 2
Independent Claim
129 words
A METHOD OF MAKING A SHEATHED HEATING UNIT COMPRISING THE STEPS OF: (A) ATTACHING A GENERALLY HOLLOW OPEN-ENDED UNEXTENDED HELICAL HEATING ELEMENT TO A TERMINAL HAVING A DUCT WHICH COMMUNICATES WITH THE INTERIOR OF THE ELEMENT TO FORM A HEATER ASSEMBLY, (B) INSERTING SAID ASSEMBLY IN A SHEATH, (C) PLACING AT LEAST A PORTION OF A FRANGIBLE CYLINDRICAL MEMBER OF INSULATING MATERIAL BETWEEN THE INNER WALL OF THE SHEATH AND THE HEATING ELEMENT TO CENTER THE HEATING ELEMENT WITH RESPECT TO THE SHEATH, (D) CLOSING ONE END OF SAID SHEATH, (E) INTRODUCING INSULATING MATERIAL THROUGH SAID DUCT OF SAID TERMINAL INTO THE INTERIOR OF SAID ELEMENT, (F) CLOSING THE OTHER END OF SAID SHEATH, AND (G) COMPRESSING THE UNIT TO EXTEND SAID HEATING ELEMENT AND COMPACT SAID INSULATING MATERIAL.
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |