US2224178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catadioptrical lens system
Assignee: Individual
•
Filing: 1940-05-08
•
Granted: 1940-12-10
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Expires: 1960-05-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Bitner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:10
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/04; F21V14/00; F21V14/06; F21V7/00; F21V7/0091; G; G02; G02B; G02B17/00; G02B17/08; G02B17/0856; G02B17/086; G02B19/00; G02B19/0004; G02B19/0028; G02B19/0033; G02B19/0047; F21Y; F21Y2115/00; F21Y2115/10
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) | 1943-12-10 | 1944-06-10 | 1944-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-10 | 1948-06-10 | 1948-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-10 | 1952-06-10 | 1952-12-10 | $7700.00 | Window Closed / Lapsed |