US2702947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirit level
Assignee: DREIER BROTHERS Inc
•
Filing: 1951-04-28
•
Granted: 1955-03-01
•
Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Dreier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE13075C
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US544677A
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GB480832A
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US2189775A
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US2206817A
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FR904443A
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US2477827A
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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) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |