US1895887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incandescent electric lamp
Assignee: Westinghouse Lamp Co
•
Filing: 1929-12-20
•
Granted: 1933-01-31
•
Expires: 1949-12-20
Abstract
No abstract record available.
Inventors
- 👤 Charles F Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:36
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/502; F21V29/503; F21V29/56; H; H01; H01K; H01K1/00; H01K1/58
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) | 1936-01-31 | 1936-08-01 | 1937-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-01-31 | 1940-08-01 | 1941-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-01-31 | 1944-08-01 | 1945-01-31 | $7700.00 | Window Closed / Lapsed |