US3278281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thoriated tungsten filament or wire and method of making same
Assignee: Philips North America LLC
•
Filing: 1957-09-13
•
Granted: 1966-10-11
•
Expires: 1977-09-13
Abstract
No abstract record available.
Inventors
- 👤 Hermann J Ehringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:14
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/02; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0031; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12333; Y10T428/12465
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
A SHOCK-RESISTANT, VIBRATION-RESISTANT AND NON-SAG FILAMENT WIRE SUITABLE FOR USE IN INCANDESCENT LAMPS, SAID WIRE COMPRISING FROM 96% TO 99 3/4% BY WEIGHT TUNGSTEN AND FROM 4% TO 1/4% BY WEIGHT THORIUM OXIDE, A PLURALITY OF MINUTE SEGREGATIONS COMPRISING SAID THORIUM OXIDE DISTRIBUTED WITHIN SAID WIRE, AND A PLURALITY OF DISCONTINUOUS STRINGER-LIKE SEGREGATION GROUPS FORMED BY SUBSTANTIALLY ALL OF SAID MINUTE SEGREGATIONS AND DISTRIBUTED THROUGHOUT SAID WIRE.
Claim 2
Dependent Claim
67 words
A SHOCK-RESISTANT, VIBRATION-RESISTANT AND NON-SAG FILAMENT WIRE SUITABLE FOR USE IN INCANDESCENT LAMPS, SAID WIRE COMPRISING FROM 96% TO 99 3/4% BY WEIGHT TUNGSTEN AND FROM 4% TO 1/4% BY WEIGHT THORIUM OXIDE, A PLURALITY OF MINUTE SEGREGATIONS COMPRISING SAID THORIUM OXIDE DISTRIBUTED WITHIN SAID WIRE, AND A PLURALITY OF DISCONTINUOUS STRINGER-LIKE SEGREGATION GROUPS FORMED BY SUBSTANTIALLY ALL OF SAID MINUTE SEGREGATIONS AND DISTRIBUTED THROUGHOUT SAID WIRE.
Claim 3
Dependent Claim
55 words
THE PROCESS OF FORMING SHOCK-RESISTANT, VIBRATIONRESISTANT AND NON-SAG FILAMENT WIRE SUITABLE FOR USE IN INCANDESCENT LAMPS, COMPRISING FORMING AN ADMIXTURE OOF TUNGSTEN METAL POWDER AND DOPING MATERIAL COMPRISING THORIUM OXIDE THE PERCENT BY WEIGHT OF THORIUM OXIDE BEING FROM 1/4% TO 4% BY WEIGHT OF THE ADMIXED TUNGSTEN, FORMING SAID ADMIXTURE INTO A SELF-SUSTAINING GREEN
Claim 4
Dependent Claim
55 words
THE PROCESS OF FORMING SHOCK-RESISTANT, VIBRATIONRESISTANT AND NON-SAG FILAMENT WIRE SUITABLE FOR USE IN INCANDESCENT LAMPS, COMPRISING FORMING AN ADMIXTURE OOF TUNGSTEN METAL POWDER AND DOPING MATERIAL COMPRISING THORIUM OXIDE THE PERCENT BY WEIGHT OF THORIUM OXIDE BEING FROM 1/4% TO 4% BY WEIGHT OF THE ADMIXED TUNGSTEN, FORMING SAID ADMIXTURE INTO A SELF-SUSTAINING GREEN
References Cited (Backward Citations)
US1082933A
Cited
US1461140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |