Patent US2441823A successfully refreshed from Google Patents.
US2441823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector lamp and optical system
Assignee: Westinghouse Electric Corp
•
Filing: 1943-02-01
•
Granted: 1948-05-18
•
Expires: 1963-02-01
Abstract
No abstract record available.
Inventors
- 👤 John H Kurlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/32; H01K1/325; H01K9/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE300937C
Cited
DE303844C
Cited
US1616660A
Cited
GB214290A
Cited
US1705146A
Cited
US1974388A
Cited
US1981329A
Cited
FR766557A
Cited
US1998187A
Cited
US2142104A
Cited
US2110590A
Cited
US2144521A
Cited
US2245793A
Cited
US2171571A
Cited
US2190569A
Cited
US2221629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-18 | 1951-11-17 | 1952-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-18 | 1955-11-17 | 1956-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-18 | 1959-11-17 | 1960-05-18 | $7700.00 | Window Closed / Lapsed |