Patent US4032808A successfully refreshed from Google Patents.
US4032808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric incandescent lamp
Assignee: US Philips Corp
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Filing: 1976-04-02
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Granted: 1977-06-28
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Expires: 1996-04-02
Abstract
Abstract The use of phosphorthionitride as a getter in electric incandescent lamps having an envelope, current carrying members, and a filament.
Inventors
- 👤 Werner Kischio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:26
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/52; H01K1/54; H01K1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
An electric incandescent lamp which comprises: a closed envelope; two conductive members extending through said envelope; a filament connected between said members and disposed within said envelope; and an oxygen getter, said oxygen getter being phosphorthionitride (PHNS).
Claim 2
Dependent Claim
37 words
An electric incandescent lamp which comprises: a closed envelope; two conductive members extending through said envelope; a filament connected between said members and disposed within said envelope; and an oxygen getter, said oxygen getter being phosphorthionitride (PHNS).
References Cited (Backward Citations)
US3898500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |