US3284230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of doping tungsten oxide
Assignee: Philips North America LLC
•
Filing: 1963-01-04
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Granted: 1966-11-08
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Expires: 1983-01-04
Abstract
No abstract record available.
Inventors
- 👤 Herman R Heytmeijer
- 👤 George H Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:37
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/02; C; C01; C01G; C01G41/00; B; B22; B22F; B22F2998/00; B22F2998/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD OF DOPING FINELY DIVIDED TUNGSTEN OXIDE PARTICLES WITH A PREDETERMINED AMOUNT OF SELECTED DOPING COMPOUND IN ORDER THAT INCANDESCIBLE TUNGSTEN FILAMENTARY WIRE PREPARED BY POWDER METALLURGY TECHNIQUES FROM THE RESULTING DOPED TUNGSTEN OXIDE WILL HAVE IMPROVED PERFORMANCE CHARACTERISTICS, WHICH METHOD COMPRISES: (A) ATOMIZING INTO SAID TUNGSTEN OXIDE PARTICLES WHILE AGITATING SAME, A PREDETERMINED AMOUNT OF SOLUTION CONTAINING A PREDETERMINED CONCENTRATION OF SELECTED DOPING COMPOUND DISSOLVED IN LIQUID VEHICLE, WITH THE RATE OF SOLUTION ATOMIZATION INTO SAID AGITATING TUNGSTEN OXIDE PARTICLES BEING SUFFICIENTLY SLOW TO INSURE UNIFORM DISTRIBUTION OF SAID SOLUTION THROUGHOUT SAID AGITATING TUNGSTEN OXIDE PARTICLES, AND WITH THE TOTAL LIQUID IN CONTACT WITH SAID TUNGSTEN OXIDE PARTICLES AFTER ATOMIZATION OF ALL DOPING COMPOUND SOLUTIONS BEING SUFFICIENT TO DAMPEN SAID TUNGSTEN OXIIDE PARTICLES BUT NOT RENDERING SAID TUNGSTEN OXIDE PARTICLES SUFFICIENTLY WET TO PELLETIZE SAME; AND (B) THEREAFTER VOLATIZING THE LIQUID COMPONENT OF SAID SOLUTION FROM SAID TUNGSTEN OXIDE PARTICLES WHILE CONTINUING TO AGITATE SAME TO LEAVE A DEPOSIT OF DOPING COMPOUND UNIFORMLY DISTRIBUTED ON SAID FINELY DIVIDED TUNGSTEN OXIDE PARTICLES.
Claim 2
Independent Claim
173 words
THE METHOD OF DOPING FINELY DIVIDED TUNGSTEN OXIDE PARTICLES WITH A PREDETERMINED AMOUNT OF SELECTED DOPING COMPOUND IN ORDER THAT INCANDESCIBLE TUNGSTEN FILAMENTARY WIRE PREPARED BY POWDER METALLURGY TECHNIQUES FROM THE RESULTING DOPED TUNGSTEN OXIDE WILL HAVE IMPROVED PERFORMANCE CHARACTERISTICS, WHICH METHOD COMPRISES: (A) ATOMIZING INTO SAID TUNGSTEN OXIDE PARTICLES WHILE AGITATING SAME, A PREDETERMINED AMOUNT OF SOLUTION CONTAINING A PREDETERMINED CONCENTRATION OF SELECTED DOPING COMPOUND DISSOLVED IN LIQUID VEHICLE, WITH THE RATE OF SOLUTION ATOMIZATION INTO SAID AGITATING TUNGSTEN OXIDE PARTICLES BEING SUFFICIENTLY SLOW TO INSURE UNIFORM DISTRIBUTION OF SAID SOLUTION THROUGHOUT SAID AGITATING TUNGSTEN OXIDE PARTICLES, AND WITH THE TOTAL LIQUID IN CONTACT WITH SAID TUNGSTEN OXIDE PARTICLES AFTER ATOMIZATION OF ALL DOPING COMPOUND SOLUTIONS BEING SUFFICIENT TO DAMPEN SAID TUNGSTEN OXIIDE PARTICLES BUT NOT RENDERING SAID TUNGSTEN OXIDE PARTICLES SUFFICIENTLY WET TO PELLETIZE SAME; AND (B) THEREAFTER VOLATIZING THE LIQUID COMPONENT OF SAID SOLUTION FROM SAID TUNGSTEN OXIDE PARTICLES WHILE CONTINUING TO AGITATE SAME TO LEAVE A DEPOSIT OF DOPING COMPOUND UNIFORMLY DISTRIBUTED ON SAID FINELY DIVIDED TUNGSTEN OXIDE PARTICLES.
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |