US3111965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed concrete structure and method of making the same
Assignee: Individual
•
Filing: 1958-02-21
•
Granted: 1963-11-26
•
Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Hodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:19
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/56; B28B21/60; B28B21/66; E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
A PRESTRESSED CONCRETE STRUCTURE OF GENERALLY ANNULAR CROSS-SECTION HAVING EMBEDDED THEREIN AND BONDED THERETO A SERIES OF LONGITUDINALLY TENSIONED PRESTRESSING WIRES EACH OF WHICH CORRESPONDS TO A STRAIGHT LINE ELEMENT OF A HYPERBOLOID OF REVOLUTION HAVING ITS AXIS COINCIDENT WITH THE AXIS OF SAID STRUCTURE, SUCCESSIVE WIRES IN SAID SERIES HAVING EQUAL AND OPPOSITE ANGULARITY WHEREBY THE SERIES OF WIRES IMPARTS BOTH LONGITUDINAL AND CIRCUMFERENTIAL PRESTRESS TO SAID STRUCTURE.
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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |