Patent US3297903A successfully refreshed from Google Patents.
US3297903A
Expired / Lapsed
US
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Threaded joint for arc carbons
Assignee: Union Carbide Corp
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Filing: 1963-10-18
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Granted: 1967-01-10
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Riek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:29
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/06; H05B31/08; H05B31/10; F; F16; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10S; Y10S403/00; Y10S403/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
AN ARC CARBON ELECTRODE ADAPTED TO BE JOINED WITH ANOTHER ARC CARBON ELECTRODE TO FORM AN ASSEMBLY OF ELECTRODES SUITABLE FOR USE IN AN ARC LAMP, SAID ELECTRODE HAVING A SOCKET IN ONE END, A PLUG ON THE OTHER END WHICH IS SHAPED TO FIT IN SAID SOCKET, AND MATING THREADS DISPOSED ON SAID PLUG AND IN SAID SOCKET, SAID THREADS HAVING BETWEEN 40 AND 27 TURNS PER LINEAR INCH AND HAVING AT LEAST THE NUMBER OF THREADS FALLING ON THE FOLLOWING LINES IN A GRAPH SHOWING THE NUMBER OF THREADS PER LINEAR INCH AGAINST THE DIAMETER OF SAID ARC CARBOM ELECTRODE: A STRAIGHT LINE CONNECTING THE POINTS 40 THREADS PER INCH AT A 7 MILLIMETER DIAMETER AND 40 THREADS PER INCH AT A 9 MILLIMETER DIAMETER, A SMOOTH CURVE CONNECTING THE POINTS 40 THREADS PER INCH AT 9 MILLIMETERS 36 THREADS PER INCH AT 10 MILLIMETERS, 32 THREADS PER INCH AT 11 MILLIMTERERS, AND 27 THREADS PER INCH ATT 13.6 MILLIMETERS, AND A STRAIGHT LINE CONNECTING THE POINTS 2( THREADS PER INCH AT 13.6 MILLIMETERS AND 37 THREADS PER INCH AT 36 MILLIMETERS.
Claim 2
Dependent Claim
184 words
AN ARC CARBON ELECTRODE ADAPTED TO BE JOINED WITH ANOTHER ARC CARBON ELECTRODE TO FORM AN ASSEMBLY OF ELECTRODES SUITABLE FOR USE IN AN ARC LAMP, SAID ELECTRODE HAVING A SOCKET IN ONE END, A PLUG ON THE OTHER END WHICH IS SHAPED TO FIT IN SAID SOCKET, AND MATING THREADS DISPOSED ON SAID PLUG AND IN SAID SOCKET, SAID THREADS HAVING BETWEEN 40 AND 27 TURNS PER LINEAR INCH AND HAVING AT LEAST THE NUMBER OF THREADS FALLING ON THE FOLLOWING LINES IN A GRAPH SHOWING THE NUMBER OF THREADS PER LINEAR INCH AGAINST THE DIAMETER OF SAID ARC CARBOM ELECTRODE: A STRAIGHT LINE CONNECTING THE POINTS 40 THREADS PER INCH AT A 7 MILLIMETER DIAMETER AND 40 THREADS PER INCH AT A 9 MILLIMETER DIAMETER, A SMOOTH CURVE CONNECTING THE POINTS 40 THREADS PER INCH AT 9 MILLIMETERS 36 THREADS PER INCH AT 10 MILLIMETERS, 32 THREADS PER INCH AT 11 MILLIMTERERS, AND 27 THREADS PER INCH ATT 13.6 MILLIMETERS, AND A STRAIGHT LINE CONNECTING THE POINTS 2( THREADS PER INCH AT 13.6 MILLIMETERS AND 37 THREADS PER INCH AT 36 MILLIMETERS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |