Patent EP0409690A1 successfully refreshed from Google Patents.
US2920136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared telescope
Assignee: Individual
•
Filing: 1955-06-22
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Granted: 1960-01-05
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Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Charles W Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1702195A
Cited
US2075808A
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US2009498A
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GB412905A
Cited
US2028475A
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US2225044A
Cited
US2370163A
Cited
US2458865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |