US3471237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of alignment of concave parabolic reflective optics
Assignee: Barnes Engineering Co
•
Filing: 1966-02-15
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Granted: 1969-10-07
•
Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 Richard W Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:38
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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SU143557A1
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US3148582A
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US3196366A
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US3375754A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |