Patent US2640267A successfully refreshed from Google Patents.
US2640267A
Expired / Lapsed
US
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Theodolite
Assignee: Keuffel and Esser Co
•
Filing: 1949-06-30
•
Granted: 1953-06-02
•
Expires: 1969-06-30
Abstract
No abstract record available.
Inventors
- 👤 Geier George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
G; G01; G01C; G01C1/00; G01C1/02; G01C1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2180136A
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US1111093A
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US1325936A
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US1958512A
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FR759485A
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GB430275A
Cited
GB518148A
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US2363877A
Cited
GB563872A
Cited
US2361741A
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US2430551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |