US2759106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical image-forming mirror system providing for grazing incidence of rays
Assignee: Individual
•
Filing: 1952-05-20
•
Granted: 1956-08-14
•
Expires: 1972-05-20
Abstract
No abstract record available.
Inventors
- 👤 Wolter Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
G; G21; G21K; G21K7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US804996A
Cited
US1865441A
Cited
US2053792A
Cited
US2198014A
Cited
US2457253A
Cited
US2557662A
Cited
US2653249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |