US3250605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a substantially stress free cathode ray tube
Assignee: Sony Corp
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Filing: 1963-09-17
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Granted: 1966-05-10
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Expires: 1983-09-17
Abstract
No abstract record available.
Inventors
- 👤 Matsumoto Yoshio
- 👤 Nemoto Yasuyoshi
- 👤 Suzuki Kosaku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:34
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/02; C03B23/00; C03B23/20; C03B23/207; C03B23/217; H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0038; H01J2893/0039
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF MANUFACTURING A GLASS CATHODE RAY TUBE HAVING A RELATIVELY SMALL DIAMETER NECK PORTION AND A LARGER DIAMETER CONICAL PORTION WHIC COMPRISES SECURING A STEM TO THE NECK OF SAID TUBE, HEATING THE NECK OF SAID TUBE TO A TEMPERATURE ABOUT THE SOFTENING POINT OF THE GLASS, SIMULTANEOUSLY HEATING THE CONICAL PORTION TO A TEMPERATURE BELOW SAID SOFTENING POINT, CONTINUOUSLY EVACUATING SAID TUBE DURING SUCH HEATING, HOLDING THE TEMPERATURE OF SAID CONICAL PORTION SUBSTANTIALLY CONSTANT WHILE COOLING THE NECK PORTION BELOW SAID SOFTENINGR TEMPERATURE UNTIL THE TEMPERATURES OF SAID CONICAL PORTION AND SAID NECK PORTION ARE SUBSTANTIALLY EQUAL AND THEREAFTER COOLING THE ENTIRE TUBE SLOWLY TO THEREBY PRODUCE A SUBSTANTIALLY STRESS FREE NECK PORTION.
Claim 2
Independent Claim
116 words
THE METHOD OF MANUFACTURING A GLASS CATHODE RAY TUBE HAVING A RELATIVELY SMALL DIAMETER NECK PORTION AND A LARGER DIAMETER CONICAL PORTION WHIC COMPRISES SECURING A STEM TO THE NECK OF SAID TUBE, HEATING THE NECK OF SAID TUBE TO A TEMPERATURE ABOUT THE SOFTENING POINT OF THE GLASS, SIMULTANEOUSLY HEATING THE CONICAL PORTION TO A TEMPERATURE BELOW SAID SOFTENING POINT, CONTINUOUSLY EVACUATING SAID TUBE DURING SUCH HEATING, HOLDING THE TEMPERATURE OF SAID CONICAL PORTION SUBSTANTIALLY CONSTANT WHILE COOLING THE NECK PORTION BELOW SAID SOFTENINGR TEMPERATURE UNTIL THE TEMPERATURES OF SAID CONICAL PORTION AND SAID NECK PORTION ARE SUBSTANTIALLY EQUAL AND THEREAFTER COOLING THE ENTIRE TUBE SLOWLY TO THEREBY PRODUCE A SUBSTANTIALLY STRESS FREE NECK PORTION.
References Cited (Backward Citations)
US1461155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |