Patent US633213A successfully refreshed from Google Patents.
US2730643A
Expired / Lapsed
US
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Electric discharge tube
Assignee: Hartford National Bank and Trust Co
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Filing: 1952-07-15
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Granted: 1956-01-10
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Expires: 1972-07-15
Abstract
No abstract record available.
Inventors
- 👤 Gier Johannes De
- 👤 Peper Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:01
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/18; H01B; H01B1/00; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28; H01J29/86; H01J29/88; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
AN ELECTRIC DISCHARGE TUBE COMPRISING AN ENVELOPE HAVING A GLASS PORTION, AND A LOW REFLECTING METAL LAYER DEPOSITED ON THE INNER SURFACE OF SAID GLASS PORTION, SAID METAL LAYER CONSISTING OF A MIXTURE OF NICKLE AND CHROMIUM AND BEING PRODUCED BY VAPORIZATION.
Claim 2
Dependent Claim
42 words
AN ELECTRIC DISCHARGE TUBE COMPRISING AN ENVELOPE HAVING A GLASS PORTION, AND A LOW REFLECTING METAL LAYER DEPOSITED ON THE INNER SURFACE OF SAID GLASS PORTION, SAID METAL LAYER CONSISTING OF A MIXTURE OF NICKLE AND CHROMIUM AND BEING PRODUCED BY VAPORIZATION.
References Cited (Backward Citations)
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US2266595A
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US2207656A
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US2280135A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |