US1565565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric gas lamp
Assignee: Westinghouse Lamp Co
•
Filing: 1922-02-02
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Granted: 1925-12-15
•
Expires: 1942-02-02
Abstract
No abstract record available.
Inventors
- 👤 Harrington Ertle Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; H01J61/00; H01J61/64; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0067
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) | 1928-12-14 | 1929-06-15 | 1929-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-12-14 | 1933-06-15 | 1933-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-12-14 | 1937-06-15 | 1937-12-15 | $7700.00 | Window Closed / Lapsed |