US2962393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing electrical resistors
Assignee: Individual
•
Filing: 1953-04-21
•
Granted: 1960-11-29
•
Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 John G Ruckelshaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:51
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/07; H01B; H01B1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF MAKING AN ELECTRICAL RESISTANCE ELEMENT ON A NON-CONDUCTING BASE ON WHICH ARE FORMED ELECTRICAL TERMINALS COMPRISING PLACING THE BASE IN A VACUUM CHAMBER, SAID BASE HAVING SAID SURFACE PROXIMATE TO AN ALLOY FILAMENT ALSO IN SAID CHAMBER, EVACUATING THE CHAMBER AND HEATING THE FILAMENT AND BASE IN SAID CHAMBER TO A TEMPERATURE BELOW THE SUBLIMATION TEMPERATURE OF THE ALLOY FILAMENT TO DEGASIFY THE BASE AND THE FILAMENT, THEN PASSING A CURRENT THROUGH THE FILAMENT, THE MAGNITUDE OF THE CURRENT BEING SUFFICIENT TO HEAT THE FILAMENT TO A POINT WHERE THE CONSTITUENT ELEMENTS OF THE FILAMENT ARE TRANSFERRED ONTO SAID PROXIMATE SURFACE OF THE BASE AND OVER AT LEAST A PORTION OF EACH OF SAID TERMINALS.
Claim 2
Independent Claim
118 words
THE METHOD OF MAKING AN ELECTRICAL RESISTANCE ELEMENT ON A NON-CONDUCTING BASE ON WHICH ARE FORMED ELECTRICAL TERMINALS COMPRISING PLACING THE BASE IN A VACUUM CHAMBER, SAID BASE HAVING SAID SURFACE PROXIMATE TO AN ALLOY FILAMENT ALSO IN SAID CHAMBER, EVACUATING THE CHAMBER AND HEATING THE FILAMENT AND BASE IN SAID CHAMBER TO A TEMPERATURE BELOW THE SUBLIMATION TEMPERATURE OF THE ALLOY FILAMENT TO DEGASIFY THE BASE AND THE FILAMENT, THEN PASSING A CURRENT THROUGH THE FILAMENT, THE MAGNITUDE OF THE CURRENT BEING SUFFICIENT TO HEAT THE FILAMENT TO A POINT WHERE THE CONSTITUENT ELEMENTS OF THE FILAMENT ARE TRANSFERRED ONTO SAID PROXIMATE SURFACE OF THE BASE AND OVER AT LEAST A PORTION OF EACH OF SAID TERMINALS.
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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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |