US3202740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stressing the reinforcing members of reinforced concrete
Assignee: CIE D INGENIEURS ET TECHNICIEN
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Filing: 1961-05-02
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Granted: 1965-08-24
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Expires: 1981-05-02
Abstract
No abstract record available.
Inventors
- 👤 Pierre C Patin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:24
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; B; B28; B28B; B28B23/00; B28B23/02; B28B23/04; B28B23/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR TENSIONING THE REINFORCING MEMBERS OF REINFORCED CONCRETE COMPRISING THE STEPS OF LUBRICATING THE INTERIORS OF A PLURALITY OF TUBES HAVING MEANS IMMOVABLY ATTACHED THERETO ENGAGING THE CONCRETE FOR APPLYING COMPRESSION TO THE CONCRETE WHEN TH FLUIC PRESSURE IS RELEASED, SUBSTANTIALLY FILLING SAID TUBES IWITH A SOLID MATERIAL, THEN SEALING THE TUBES, THEN APPLYING A FLUID PRESSUR IN SAID TUBES UPON AN END OF SAID SOLID MATERIAL LONGTUDINALLY EXPANDING SAID TUBES, THEN POURING CONCRETE AROUND AND OVER SAID TUBES AND THEN RELEASING THE PRESSURE AFTER THE CONCRETE HAS HARDENED ABOUT AND ENGAGED SAID TUBES WHEREBY SAID TUBES CONTRACT AND STRESS THE CONCRETE.
Claim 2
Independent Claim
104 words
A METHOD FOR TENSIONING THE REINFORCING MEMBERS OF REINFORCED CONCRETE COMPRISING THE STEPS OF LUBRICATING THE INTERIORS OF A PLURALITY OF TUBES HAVING MEANS IMMOVABLY ATTACHED THERETO ENGAGING THE CONCRETE FOR APPLYING COMPRESSION TO THE CONCRETE WHEN TH FLUIC PRESSURE IS RELEASED, SUBSTANTIALLY FILLING SAID TUBES IWITH A SOLID MATERIAL, THEN SEALING THE TUBES, THEN APPLYING A FLUID PRESSUR IN SAID TUBES UPON AN END OF SAID SOLID MATERIAL LONGTUDINALLY EXPANDING SAID TUBES, THEN POURING CONCRETE AROUND AND OVER SAID TUBES AND THEN RELEASING THE PRESSURE AFTER THE CONCRETE HAS HARDENED ABOUT AND ENGAGED SAID TUBES WHEREBY SAID TUBES CONTRACT AND STRESS THE CONCRETE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |