Patent US2197350A successfully refreshed from Google Patents.
Patent US3137924A successfully refreshed from Google Patents.
US3137924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electric heaters
Assignee: Olin Corp
•
Filing: 1959-09-04
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Granted: 1964-06-23
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Expires: 1979-09-04
Abstract
No abstract record available.
Inventors
- 👤 John D Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:06
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/30; B; B23; B23P; B23P19/00; B23P19/02; B23P19/022; H05B3/10; H05B3/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083; Y10T29/49087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD OF SHEATHING AN ELECTRIC HEATING ELEMENT IN A SOLID AND SUBSTANTIALLY RIGID STRUCTURE CONTAINING A CONTINUOUS AND UNBRANCHED HOLLOW OF SUBSTANTIALLY UNIFORM CROSS-SECTION EXTENDING IN A MULTI-DIRECTIONAL PATTERN THEREIN, SAID METHOD COMPRISING MOUNTING A PLURALITY OF HEATCONDUCTING ELECTRIC-INSULATING SPACING MEMBERS AT SPACED POINTS ON SAID ELEMENT, ATTACHING ONE END OF SAID ELEMENT TO A TRAVELING LEADER PLUG ADAPTED TO CONFORM TO THE CROSS-SECTION OF SAID HOLLOW IN SUBSTANTIALLY SEALING RELATIONSHIP THEREWITH, INSERTING SAID PLUG IN SAID HOLLOW, HYDRAULICALLY PROPELLING SAID PLUG THROUGH REMAINING PORTIONS OF SAID HOLLOW UNDER THE DIRECT INFLUENCE OF A FLUID UNDER SUFFICIENT PRESSURE TO THREAD SAID ELEMENT AND MOUNTED MEMBERS IN SAID HOLLOW WITH SAID FLUID COMPRISING A SLURRY OF A HEAT-CONDUCTING ELECTRIC-INSULATING MATERIAL AND, INCLUDING THE STEP OF RETAINING THE SOLID PORTION OF SAID SLURRY IN SAID HOLLOW.
Claim 2
Independent Claim
135 words
A METHOD OF SHEATHING AN ELECTRIC HEATING ELEMENT IN A SOLID AND SUBSTANTIALLY RIGID STRUCTURE CONTAINING A CONTINUOUS AND UNBRANCHED HOLLOW OF SUBSTANTIALLY UNIFORM CROSS-SECTION EXTENDING IN A MULTI-DIRECTIONAL PATTERN THEREIN, SAID METHOD COMPRISING MOUNTING A PLURALITY OF HEATCONDUCTING ELECTRIC-INSULATING SPACING MEMBERS AT SPACED POINTS ON SAID ELEMENT, ATTACHING ONE END OF SAID ELEMENT TO A TRAVELING LEADER PLUG ADAPTED TO CONFORM TO THE CROSS-SECTION OF SAID HOLLOW IN SUBSTANTIALLY SEALING RELATIONSHIP THEREWITH, INSERTING SAID PLUG IN SAID HOLLOW, HYDRAULICALLY PROPELLING SAID PLUG THROUGH REMAINING PORTIONS OF SAID HOLLOW UNDER THE DIRECT INFLUENCE OF A FLUID UNDER SUFFICIENT PRESSURE TO THREAD SAID ELEMENT AND MOUNTED MEMBERS IN SAID HOLLOW WITH SAID FLUID COMPRISING A SLURRY OF A HEAT-CONDUCTING ELECTRIC-INSULATING MATERIAL AND, INCLUDING THE STEP OF RETAINING THE SOLID PORTION OF SAID SLURRY IN SAID HOLLOW.
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |