US2784641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alignment telescope
Assignee: Keuffel and Esser Co
•
Filing: 1952-06-20
•
Granted: 1957-03-12
•
Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 Carl W Keuffel
- 👤 Conway D Hillman
- 👤 Allister L Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:48
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/14; G01; G01B; G01B11/00; G01B11/26; G01B11/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |