US3277330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent lamp with tac filament and cyanide-radical producing and halogen atmosphere
Assignee: Polaroid Corp
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Filing: 1960-07-15
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Granted: 1966-10-04
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Expires: 1980-07-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Dexter P Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/04; H01K1/10; H01K1/50; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
AN INCANDESCENT LAMP COMPRISING AN EVACUABLE LIGHTTRANSMISSIVE ENVELOPE HAVING THEREIN A FILAMENT OR TANTALUM CARBIDE AND A GASEOUS FILLING CONTAINING HALOGEN AND WHICH UPON THERMAL DECOMPOSITION PRODUCES A PARTIAL PRESSURE TO CYANIDE RADICAL CONTAINING GAS IN THE VICINITY OF SAID FILAMENT WHEN SAID FILAMENT BECOMES INCANDESCENT.
Claim 2
Dependent Claim
46 words
AN INCANDESCENT LAMP COMPRISING AN EVACUABLE LIGHTTRANSMISSIVE ENVELOPE HAVING THEREIN A FILAMENT OR TANTALUM CARBIDE AND A GASEOUS FILLING CONTAINING HALOGEN AND WHICH UPON THERMAL DECOMPOSITION PRODUCES A PARTIAL PRESSURE TO CYANIDE RADICAL CONTAINING GAS IN THE VICINITY OF SAID FILAMENT WHEN SAID FILAMENT BECOMES INCANDESCENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |