Patent USRE27460E successfully refreshed from Google Patents.
USRE27460E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for encasing rigid members with concrete
Assignee: —
•
Filing: 1970-07-30
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Granted: 1972-08-15
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Expires: 1990-07-30
Abstract
Abstract A FORM COMPRISED OF A SLEEVE OF FLEXIBLE POROUS MATERIAL IS POSITIONED AROUND AN ELONGATED RIGID MEMBER WITH THE ENDS OF THE SLEEVE PRESSED AGAINST THE MEMBERS TO FORM A SPACE BETWEEN THE FORM AND THE MATERIAL. A CEMENTITIOUS SLURRY OF A KNOWN LIQUID-CEMENT RATIO IS PUMPED INTO THE SPACE UNTIL A PRESSURE IS BUILT UP AND THE FORM IS INFLATED. THE PUMPING IS CONTINUED UNTIL SOME OF THE LIQUID IN THE SLURRY PASSES OUTWARDLY THROUGH THE PORES OF THE FABRIC AND THE LIQUID-CEMENT RATIO IS LOWERED.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:21
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/26
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |