USRE27061E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a reinforced composite concrete pipe
Assignee: —
•
Filing: 1969-05-07
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Granted: 1971-02-16
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Expires: 1989-05-07
Abstract
Abstract METHODS OF MAKING REINFORCED CONCRETE PIPES WHICH ARE SUBSTANTIALLY IMPERVIOUS TO THE ENTRANCE OF ADVERSE CHEMICALS. THE PORES AT THE OUTSIDE OR INSIDE SURFACES OF THE CONCRETE PIPE ARE FILLED AND COVERED WITH A POLYMERIZABLE POLYMERIC RESIN COMPOSITION WITH GLASS FIBERS BEING EMBEDDED IN THE RESIN COMPOSITION.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/8008; B29C53/805; B28; B28B; B28B21/00; B28B21/56; B28B21/60; B28B21/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |