Patent US3210589A successfully refreshed from Google Patents.
US3210589A
Expired / Lapsed
US
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Electric incandescent lamp having filament of partially recrystallized fibrous structure
Assignee: Westinghouse Electric Corp
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Filing: 1960-04-28
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Granted: 1965-10-05
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Expires: 1980-04-28
Abstract
No abstract record available.
Inventors
- 👤 Julien J Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:16
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/04; H01K1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A FLASHED INCANDESCENT LAMP READY FOR USE, THE IMPROVEMENT COMPRISING A FILAMENT OF PARTLY RECRYSTALLIZED REFRACTORY METAL WIRE COMPOSED OF A PLURALITY OF DISCRETE GRAINS AND UNRECRYSTALLIZED FIBROUS REGIONS THAT ARE INTEMINGLED ONE WITH ANOTHER, WITH PORTIONS OF SAID UNRECRYSTALLIZED FIBROUS REGTIONS EXTENDING BETWEEN AND JOINING SUBSTANTIAL PORTIONS OF ADJACENT ONES OF SAID GRAINS.
Claim 2
Dependent Claim
55 words
IN A FLASHED INCANDESCENT LAMP READY FOR USE, THE IMPROVEMENT COMPRISING A FILAMENT OF PARTLY RECRYSTALLIZED REFRACTORY METAL WIRE COMPOSED OF A PLURALITY OF DISCRETE GRAINS AND UNRECRYSTALLIZED FIBROUS REGIONS THAT ARE INTEMINGLED ONE WITH ANOTHER, WITH PORTIONS OF SAID UNRECRYSTALLIZED FIBROUS REGTIONS EXTENDING BETWEEN AND JOINING SUBSTANTIAL PORTIONS OF ADJACENT ONES OF SAID GRAINS.
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |