US2706498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed tubular concrete structures
Assignee: RAYMOND CONCRETE PILE CO
•
Filing: 1950-11-13
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Granted: 1955-04-19
•
Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 Maxwell M Upson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:03
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/56; B28B21/60; F; F16; F16L; F16L25/00; F16L25/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB556572A
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Cited
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Cited
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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) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |