US2824381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-indicator of pipe positions and bends
Assignee: Blackhawk Manufacturing Co
•
Filing: 1955-04-29
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Granted: 1958-02-25
•
Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Traupmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:31
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/34; F; F16; F16M; F16M13/00; F16M13/02; F16M13/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US449609A
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GB191503471A
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US1927504A
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US2129695A
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US2659975A
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US2660804A
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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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |