Patent US1626685A successfully refreshed from Google Patents.
US1626685A
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US
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Activation by means of hydrogen-free, carbon-bearing gas
Assignee: Westinghouse Lamp Co
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Filing: 1923-04-10
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Granted: 1927-05-03
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Expires: 1943-04-10
Abstract
No abstract record available.
Inventors
- 👤 Marden John Wesley
- 👤 Thomas Thomas Philip
- 👤 Conley John Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:44
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/045; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1930-05-02 | 1930-11-01 | 1931-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-05-02 | 1934-11-01 | 1935-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-05-02 | 1938-11-01 | 1939-05-03 | $7700.00 | Window Closed / Lapsed |