Patent US3655847A successfully refreshed from Google Patents.
US3655847A
Expired / Lapsed
US
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Method for forming concrete panels under compression
Assignee: Individual
•
Filing: 1969-02-19
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Granted: 1972-04-11
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Expires: 1989-02-19
Abstract
Abstract THE INVENTION RELATES TO A METHOD PARTICULARLY ADAPTED FOR FORMING CONCRETE PANEL UNDER PRESSURE WHICH ESSENTIALLY COMPRISES POSITIONING AN EXPANDABLE TUBE WITHIN THE CONCRETE TO BE FORMED AND HEATING AND PRESSURIZING THE TUBE INTO EXPANSION WHILE RETAINING OR MAINTAINING A UNIFORM CAVITY SIZE DURING THE FORMING OPERATION WHEREBY INTERNAL PRESSURE IS THIS EXERTED ONTO THE FORMED CONCRETE BY THE PRESSURIZATION OF THE EXPANDABLE TUBE TO INCREASE DENSITY AND STRUCTURAL STRENGTH WHILE LOWERING CURING TIME OF THE CONCRETE PANELS SO FORMED.
Inventors
- 👤 Burton D Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:20
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/003; B28B7/00; B28B7/28; B28B7/30; B28B7/32; B28B7/40; B28B7/42; B28B7/46; Y; Y10; Y10S; Y10S264/00; Y10S264/43
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |