US3349269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Astigmatic lens arrangement for cathode ray tubes
Assignee: Stromberg Carlson Corp
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Filing: 1963-11-29
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Granted: 1967-10-24
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Omer F Hamann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:53
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A SHAPED-BEAM TUBE, AN ELECTRON BEAM GENERATOR, MEANS FOR SHAPING SAID BEAM TO FORM A SYMBOL, A SCREEN FOR RECEIVING AN IMAGE OF SAID SYMBOL, AND AN ASTIGMATIC ELECTRON LENS DEVICE POSITIONED BETWEEN SAID MEANS FOR SHAPING SAID BEAM AND SAID SCREEN FOR FOCUSING SAID BEAM, SAID ASTIGMATIC ELECTRON LENS DEVICE INCLUDING FIRST AND SECOND PAIRS OF PARTIAL CYLINDRICAL LENS MEMBERS, SAID LENS MEMBERS OF EACH PAIR HAVING THEIR CYLINDRICAL SURFACES OPPOSED ON OPPOSITE SIDES OF THE BEAM PATH, THE AXES OF SAID LENS MEMBERS OF SAID FIRST PAIR BEING TRANSVERSE TO THE AXES OF SAID LENS MEMBERS OF SAID SECOND PAIR AND TO THE BEAM PATH.
Claim 2
Dependent Claim
108 words
IN A SHAPED-BEAM TUBE, AN ELECTRON BEAM GENERATOR, MEANS FOR SHAPING SAID BEAM TO FORM A SYMBOL, A SCREEN FOR RECEIVING AN IMAGE OF SAID SYMBOL, AND AN ASTIGMATIC ELECTRON LENS DEVICE POSITIONED BETWEEN SAID MEANS FOR SHAPING SAID BEAM AND SAID SCREEN FOR FOCUSING SAID BEAM, SAID ASTIGMATIC ELECTRON LENS DEVICE INCLUDING FIRST AND SECOND PAIRS OF PARTIAL CYLINDRICAL LENS MEMBERS, SAID LENS MEMBERS OF EACH PAIR HAVING THEIR CYLINDRICAL SURFACES OPPOSED ON OPPOSITE SIDES OF THE BEAM PATH, THE AXES OF SAID LENS MEMBERS OF SAID FIRST PAIR BEING TRANSVERSE TO THE AXES OF SAID LENS MEMBERS OF SAID SECOND PAIR AND TO THE BEAM PATH.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |