US2664027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified schmidt-type optical system
Assignee: General Precision Laboratory Inc
•
Filing: 1951-02-07
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Granted: 1953-12-29
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Expires: 1971-02-07
Abstract
No abstract record available.
Inventors
- 👤 Louis P Raitiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:24
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0884; G02B17/0888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2170979A
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US2141884A
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US2273801A
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US2295779A
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US2309788A
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US2350112A
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US2492461A
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US2449345A
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US2454144A
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US2470198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |