Patent US3335539A successfully refreshed from Google Patents.
US3335539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirally ribbed reinforcing bar for concrete
Assignee: TOR ISTEG STEEL CORP
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Filing: 1963-09-09
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Granted: 1967-08-15
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Expires: 1983-09-09
Abstract
No abstract record available.
Inventors
- 👤 Soretz Stefan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:21
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/14; B21D11/15; E; E04; E04C; E04C5/00; E04C5/01; E04C5/02; E04C5/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A REINFORCING BAR FOR CONCRETE, SAID BAR HAVING A RIGHT CYLINDRICAL CORE WHICH IS CIRCULAR IN TRANSVERSE CROSSSECTION, TWO CONTINUOUS LONGITUDINAL RIBS EXTENDING HELICALLY ROUND THE PERIPHERY OF THE CORE, A LONGITUDINAL SERIES OF RELATIVELY SHORT SPIRAL LUGS ARRANGED ON THE CORE BETWEEN THE TWO CONTINUOUS LONGITUDINAL RIBS, EACH OF SAID LUGS HAVING FORWARD AND REAR ENDS, THE REAR END OF EACH LUG BEING IN LONGITUDINAL OVERLAPPING RELATIONSHIP WITH THE FORWARD END OF AN ADJACENT PRECEDING LUG, EACH OF SAID LUGS BEING OBLIQUELY DISPOSED ON THE CORE WITH THE FORWARD AND REAR ENDS TERMINATING SHORT OF THE RIBS, THE LONGITUDINAL AXIS OF EACH LUG DEFINING AN ACUTE ANGLE WITH THE LONGITUDINAL AXIS OF THE CORE RANGING BETWEEN 30 TO 50 DEGREES, EACH OF SAID LUGS HAVING A TRANSVERSE AND LONGITUDINAL COMPONENT OF LENGTH MEASURED RESPECTIVELY PARALLEL AND NORMAL TO THE LONGITUDINAL AXIS OF THE CORE, THE TRANSVERSE COMPONENT OF LENGTH OF EACH LUG BE-
Claim 2
Dependent Claim
154 words
A REINFORCING BAR FOR CONCRETE, SAID BAR HAVING A RIGHT CYLINDRICAL CORE WHICH IS CIRCULAR IN TRANSVERSE CROSSSECTION, TWO CONTINUOUS LONGITUDINAL RIBS EXTENDING HELICALLY ROUND THE PERIPHERY OF THE CORE, A LONGITUDINAL SERIES OF RELATIVELY SHORT SPIRAL LUGS ARRANGED ON THE CORE BETWEEN THE TWO CONTINUOUS LONGITUDINAL RIBS, EACH OF SAID LUGS HAVING FORWARD AND REAR ENDS, THE REAR END OF EACH LUG BEING IN LONGITUDINAL OVERLAPPING RELATIONSHIP WITH THE FORWARD END OF AN ADJACENT PRECEDING LUG, EACH OF SAID LUGS BEING OBLIQUELY DISPOSED ON THE CORE WITH THE FORWARD AND REAR ENDS TERMINATING SHORT OF THE RIBS, THE LONGITUDINAL AXIS OF EACH LUG DEFINING AN ACUTE ANGLE WITH THE LONGITUDINAL AXIS OF THE CORE RANGING BETWEEN 30 TO 50 DEGREES, EACH OF SAID LUGS HAVING A TRANSVERSE AND LONGITUDINAL COMPONENT OF LENGTH MEASURED RESPECTIVELY PARALLEL AND NORMAL TO THE LONGITUDINAL AXIS OF THE CORE, THE TRANSVERSE COMPONENT OF LENGTH OF EACH LUG BE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |