US2766385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical image-forming plural reflecting mirror systems
Assignee: Individual
•
Filing: 1953-09-08
•
Granted: 1956-10-09
•
Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Herrnring Gunther
- 👤 Weidner Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
G; G21; G21K; G21K7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US804996A
Cited
GB190929282A
Cited
US1865441A
Cited
US1763630A
Cited
US2198014A
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US2457253A
Cited
US2557662A
Cited
US2653249A
Cited
FR1055368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |