Patent US2628533A successfully refreshed from Google Patents.
US2628533A
Expired / Lapsed
US
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Image forming optical reflecting and converging mirror device
Assignee: Individual
•
Filing: 1951-10-17
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Granted: 1953-02-17
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Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 Robert A Oetjen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/50; G02B30/56; G02B17/00; G02B17/02; G02B17/06; G02B17/0605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US804996A
Cited
US1053650A
Cited
US1552451A
Cited
US1763630A
Cited
US2476124A
Cited
US2327947A
Cited
US2441160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |