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US2810206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirit level
Assignee: Individual
•
Filing: 1955-09-15
•
Granted: 1957-10-22
•
Expires: 1975-09-15
Abstract
No abstract record available.
Inventors
- 👤 Harry J Ziemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:17
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/26; G01C9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US786269A
Cited
US813561A
Cited
US1777429A
Cited
US2557291A
Cited
US2453091A
Cited
US2495646A
Cited
CH280539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |