US2885310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making film resistors
Assignee: Ohmite Manufacturing Co
•
Filing: 1954-09-13
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Granted: 1959-05-05
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Expires: 1974-09-13
Abstract
No abstract record available.
Inventors
- 👤 Earl R Olson
- 👤 Robert F Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/20; C; C23; C23C; C23C16/00; C23C16/06; C23C16/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF MAKING A FILM RESISTOR WHICH COMPRISES VAPORIZING A CHLORIDE SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES OF TANTALUM, MOLYBDENUM, TUNGSTEN AND VANADIUM AND MIXING SAID VAPORIZED CHLORIDE WITH HYDROGEN WHILE MAINTAINING SAID VAPORIZED CHLORIDE AT A TEMPERATURE BELOW THAT TEMPERATURE AT AWHICH SAID CHLORIDE WILL BE DECOMPOSED TO FORM A FREE METAL; HEATING A DIELECTIC CORE TO A TEMPERATURE AT WHICH SAID CHLORIDE WILL BE REDUCE BY SAID HYDROGEN; AND CONTACTING SAID VAPORIZED CHLORIDE-HYDROGEN MIXTURE WITH SAID HEATED CORE WHEREBY SAID CHLORIDE IS REDUCED AT THE SURFACE OF SAID CORE AND SAID IS COATED TO FORM A RESISTIVE FILM THEREON.
Claim 2
Independent Claim
104 words
THE METHOD OF MAKING A FILM RESISTOR WHICH COMPRISES VAPORIZING A CHLORIDE SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES OF TANTALUM, MOLYBDENUM, TUNGSTEN AND VANADIUM AND MIXING SAID VAPORIZED CHLORIDE WITH HYDROGEN WHILE MAINTAINING SAID VAPORIZED CHLORIDE AT A TEMPERATURE BELOW THAT TEMPERATURE AT AWHICH SAID CHLORIDE WILL BE DECOMPOSED TO FORM A FREE METAL; HEATING A DIELECTIC CORE TO A TEMPERATURE AT WHICH SAID CHLORIDE WILL BE REDUCE BY SAID HYDROGEN; AND CONTACTING SAID VAPORIZED CHLORIDE-HYDROGEN MIXTURE WITH SAID HEATED CORE WHEREBY SAID CHLORIDE IS REDUCED AT THE SURFACE OF SAID CORE AND SAID IS COATED TO FORM A RESISTIVE FILM THEREON.
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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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |