Patent US2779231A successfully refreshed from Google Patents.
US2779231A
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US
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Device for determining small inclinations from the vertical or horizontal
Assignee: Carl Zeiss AG
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Filing: 1950-11-09
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Granted: 1957-01-29
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Expires: 1970-11-09
Abstract
No abstract record available.
Inventors
- 👤 Drodofsky Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:38
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/12
Claims Analysis
Total Claims: 0
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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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |