US3230027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing cold cathode gas discharge tubes
Assignee: Hivac Ltd
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Filing: 1963-03-22
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Granted: 1966-01-18
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Expires: 1983-03-22
Abstract
No abstract record available.
Inventors
- 👤 Mayer Cecil Hedworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/395; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
METHOD OF CONSTRUCTING A COLD CATHODE GAS DISCHARGE TUBE HAVING A LOW PRESSURE GAS FILLING WHICH INCLUDES MERCURY, WHICH METHOD COMPRISES THE STEPS OF INTRODUCING WITH THE TUBE ENVELOPE PRIOR TO PUMPING AND SEALING A QUANTITY OF A MIXTURE OF AN OXIDE OF MERCURY AND RED
Claim 2
Dependent Claim
46 words
METHOD OF CONSTRUCTING A COLD CATHODE GAS DISCHARGE TUBE HAVING A LOW PRESSURE GAS FILLING WHICH INCLUDES MERCURY, WHICH METHOD COMPRISES THE STEPS OF INTRODUCING WITH THE TUBE ENVELOPE PRIOR TO PUMPING AND SEALING A QUANTITY OF A MIXTURE OF AN OXIDE OF MERCURY AND RED
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |