US3086273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for pre-stressing concrete
Assignee: Super Concrete Emulsions Ltd
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Filing: 1959-12-28
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Granted: 1963-04-23
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Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 Welborn Jack Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF PRE-STRESSING CONCRETE COMPRISING STEPS OF: COATING AT LEAST ONE TENDON WITH A THIN COAT OF CONCENTRATED RETARDANT INCLUDING A SALT OF TETRA-HYDROXY ADIPIC ACID IN A RESINOUS EMULSION SOLUBLE IN ALKALINE WATER AND FREE OF ANY CONCRETE MIX PRIOR TO THE POSITIONING OF SAID TENDON IN ANY CONCRETE MOLD; TRANSPORTING THE COATED TENDON TO AND POSITIONING THE COATED TENDON IN A CONCRETE MOLD; POURING CONCRETE IN A DESIRED PATTERN TO COVER SAID TENDON, THE ENDS OF SAID TENDON BEING ACCESSIBLE FROM PORTIONS OF SAID PATTERN BETWEEN WHICH TENSILE STRESS IS TO BE PROVIDED; CURING SAID CONCRETE SUFFICIENTLY TO ENABLE SAID PATTERN TO RETAIN ITS SHAPE AGAINST COMPRESSIVE FORCES RESULTING FROM TENSION OF SAID TENDON AND THEREAFTER TENSIONING SAID TENDON BY APPLYING PULLING FORCES TO SAID ENDS.
Claim 2
Independent Claim
129 words
A METHOD OF PRE-STRESSING CONCRETE COMPRISING STEPS OF: COATING AT LEAST ONE TENDON WITH A THIN COAT OF CONCENTRATED RETARDANT INCLUDING A SALT OF TETRA-HYDROXY ADIPIC ACID IN A RESINOUS EMULSION SOLUBLE IN ALKALINE WATER AND FREE OF ANY CONCRETE MIX PRIOR TO THE POSITIONING OF SAID TENDON IN ANY CONCRETE MOLD; TRANSPORTING THE COATED TENDON TO AND POSITIONING THE COATED TENDON IN A CONCRETE MOLD; POURING CONCRETE IN A DESIRED PATTERN TO COVER SAID TENDON, THE ENDS OF SAID TENDON BEING ACCESSIBLE FROM PORTIONS OF SAID PATTERN BETWEEN WHICH TENSILE STRESS IS TO BE PROVIDED; CURING SAID CONCRETE SUFFICIENTLY TO ENABLE SAID PATTERN TO RETAIN ITS SHAPE AGAINST COMPRESSIVE FORCES RESULTING FROM TENSION OF SAID TENDON AND THEREAFTER TENSIONING SAID TENDON BY APPLYING PULLING FORCES TO SAID ENDS.
References Cited (Backward Citations)
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Cited
US2174051A
Cited
US2315895A
Cited
US2582751A
Cited
US2702424A
Cited
GB777318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |