US2757567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Theodolite having scale reading means
Assignee: Keuffel and Esser Co
•
Filing: 1951-12-05
•
Granted: 1956-08-07
•
Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Conway D Hillman
- 👤 Allister L Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:08
CPC Classifications
G; G01; G01C; G01C1/00; G01C1/02; G01C1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1542397A
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GB387776A
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DE591704C
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US2221317A
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US2144696A
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DE745953C
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GB541948A
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US2359484A
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US2363877A
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US2480237A
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US2498273A
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US2552893A
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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) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |