US2838705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color-corrected reflector high pressure mercury vapor lamp and method of preparing
Assignee: Westinghouse Electric Corp
•
Filing: 1953-12-03
•
Granted: 1958-06-10
•
Expires: 1973-12-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank J Hierholzer
- 👤 Thorington Luke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:25
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/82; H01J61/822; H01J61/02; H01J61/38; H01J61/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |