US3285569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for post-tensioning concrete structures
Assignee: Prescon Corp
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Filing: 1965-05-10
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Granted: 1966-11-15
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Marr Robert R La
- 👤 Charles E Newins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; E04G21/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN AN APPARATUS FOR POST-TENSIONING CONCRETE STRUCTURES WHEREIN A PAIR OF TENSIONING PLATES ARE PROVIDED, ONE TENSIONING PLATE BEING SECURED TO INBOARD ENDS OF EACH OF TWO SETS OF TENDONS, WITH THESE SETS OF TENDONS EXTENDING IN OPPOSITE DIRECTIONS THROUGH A CONCRETE STRUCTURE RELATIVE TO ONE ANOTHER, THE OUTBOARD ENDS OF BOTH SETS OF THE TENDONS BEING ANCHORED TO THE CONCRETE STRUCTURE, THE COMBINATION OF: (A) A PAIR OF JAWS ENGAGEABLE WITH THESE TENSIONING PLATES; (B) AND MEANS CONNECTED TO THE JAWS AND BEING OPERABLE TO MOVE THE TENSIONING PLATES SIMULTANEOUSLY RELATIVE TO ONE ANOTHER SO AS TO POST-TENSION ALL OF THE TENDONS AT ONE TIME.
Claim 2
Dependent Claim
106 words
IN AN APPARATUS FOR POST-TENSIONING CONCRETE STRUCTURES WHEREIN A PAIR OF TENSIONING PLATES ARE PROVIDED, ONE TENSIONING PLATE BEING SECURED TO INBOARD ENDS OF EACH OF TWO SETS OF TENDONS, WITH THESE SETS OF TENDONS EXTENDING IN OPPOSITE DIRECTIONS THROUGH A CONCRETE STRUCTURE RELATIVE TO ONE ANOTHER, THE OUTBOARD ENDS OF BOTH SETS OF THE TENDONS BEING ANCHORED TO THE CONCRETE STRUCTURE, THE COMBINATION OF: (A) A PAIR OF JAWS ENGAGEABLE WITH THESE TENSIONING PLATES; (B) AND MEANS CONNECTED TO THE JAWS AND BEING OPERABLE TO MOVE THE TENSIONING PLATES SIMULTANEOUSLY RELATIVE TO ONE ANOTHER SO AS TO POST-TENSION ALL OF THE TENDONS AT ONE TIME.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |