US2673940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and means for preventing film deposits in lamps
Assignee: GAF Chemicals Corp
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Filing: 1951-04-28
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Granted: 1954-03-30
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Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Sam C Slifkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:13
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE COMBINATION WITH A WATER-COOLED ELECTRIC LAMP WHEREIN THE LAMP IS MOUNTED BETWEEN ELECTRIC-SUPPLY TERMINALS, IN A JACKET IN A SYSTEM THROUGH WHICH THE COOLING WATER CIRCULATES IN CONTACT WITH SAID TERMINALS, OF ION-EXCHANGE MEANS COMPRISING A MIXTURE OF ANION AND CATION EXCHANGE RESINS FOR TREATING SAID WATER DURING THE CIRCULATION THEREOF IN SAID SYSTEM TO PREVENT THE DEPOSITION OF A COATING ON THE ECTERIOR OF SAID LAMP.
Claim 2
Dependent Claim
68 words
THE COMBINATION WITH A WATER-COOLED ELECTRIC LAMP WHEREIN THE LAMP IS MOUNTED BETWEEN ELECTRIC-SUPPLY TERMINALS, IN A JACKET IN A SYSTEM THROUGH WHICH THE COOLING WATER CIRCULATES IN CONTACT WITH SAID TERMINALS, OF ION-EXCHANGE MEANS COMPRISING A MIXTURE OF ANION AND CATION EXCHANGE RESINS FOR TREATING SAID WATER DURING THE CIRCULATION THEREOF IN SAID SYSTEM TO PREVENT THE DEPOSITION OF A COATING ON THE ECTERIOR OF SAID LAMP.
References Cited (Backward Citations)
US2245406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |