US3296480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge lamps with sinuous discharge path between electrodes
Assignee: Individual
•
Filing: 1963-11-19
•
Granted: 1967-01-03
•
Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Walz Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/10; H01J61/103; G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/06021; G11C11/06028; G11C11/06042; H01J61/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A GAS DISCHARGE LAMP COMPRISING, IN COMBINATION, TWO SMOOTH-SURFACED WALL PARTS WHICH ARE COAXIAL SURFACES OF REVOLUTION AND DEFINE BETWEEN THEM A SEALED ANNULAR SPACE WHOSE DIAMETER IS SUBSTANTIALLY LESS AT ONE AXIAL END THAN AT THE OTHER AXIAL END; A MIDDLE PART DISPOSED WITHIN AND ALONG SAID ANNULAR SPACE AND HAVING HELICAL PROJECTIONS ON BOTH ITS RADIALLY INNER SURFACE AND ITS RADIALLY OUTER SURFACE, EACH HELICAL PROJECTION BEING IN SEALING CONTIGUOUS RELATION WITH THE SMOOTH INNER SURFACE OF THE RESPECTIVE ADJACENT WALL PART; EACH PROJECTION FORMING, WITH THE WALL PART IN CONTACT THEREWITH, ONE PART OF A DISCHARGE PATH, AND CORRESPONDING AXIAL ENDS OF THE TWO PARTS OF THE DISCHARGE PATH COMMUNICATING WITH EACH OTHER AT THE LARGER
Claim 2
Dependent Claim
119 words
A GAS DISCHARGE LAMP COMPRISING, IN COMBINATION, TWO SMOOTH-SURFACED WALL PARTS WHICH ARE COAXIAL SURFACES OF REVOLUTION AND DEFINE BETWEEN THEM A SEALED ANNULAR SPACE WHOSE DIAMETER IS SUBSTANTIALLY LESS AT ONE AXIAL END THAN AT THE OTHER AXIAL END; A MIDDLE PART DISPOSED WITHIN AND ALONG SAID ANNULAR SPACE AND HAVING HELICAL PROJECTIONS ON BOTH ITS RADIALLY INNER SURFACE AND ITS RADIALLY OUTER SURFACE, EACH HELICAL PROJECTION BEING IN SEALING CONTIGUOUS RELATION WITH THE SMOOTH INNER SURFACE OF THE RESPECTIVE ADJACENT WALL PART; EACH PROJECTION FORMING, WITH THE WALL PART IN CONTACT THEREWITH, ONE PART OF A DISCHARGE PATH, AND CORRESPONDING AXIAL ENDS OF THE TWO PARTS OF THE DISCHARGE PATH COMMUNICATING WITH EACH OTHER AT THE LARGER
References Cited (Backward Citations)
US1602245A
Cited
US2316348A
Cited
DE853616C
Cited
GB697087A
Cited
DE906245C
Cited
US2938137A
Cited
US2985787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |