US3385015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built-up girder having metal shell and prestressed concrete tension flange and method of making the same
Assignee: Individual
•
Filing: 1966-04-20
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Granted: 1968-05-28
•
Expires: 1986-04-20
Abstract
No abstract record available.
Inventors
- 👤 Homer M Hadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:43
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/29; E04C3/293; E04C3/294; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49632; Y10T29/49826; Y10T29/49863; Y10T29/49874
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A BUILT-UP GIRDER COMPRISING A ROLLED METAL STRUCTURAL SHAPE INCLUDING A PLATE WEB HAVING SUBSTANTIALLY FLAT FLANGES ON OPPOSITE EDGES THEREOF, THE GIRDER TENSION FLANGE INCLUDING A UNITARY METAL SHELL DEFINING A PERIPHERALLY CONTINUOUS HOLLOW AND HAVING ONE OF SAID STRUCTURAL SHAPE''S FLAT FLANGES FORMING A WALL PORTION OF SAID SHELL, PRESTRESSING STRANDS EXTENDING ALONG SUCH HOLLOW WITH THEIR LENGTHS SUBSTANTIALLY PARALLEL TO THE LENGTH OF THE GIRDER, AND CONCRETE IN THE HOLLOW OF SAID SHELL ENGAGED WITH SAID SHELL AND PRESTRESSED BY SAID STRANDS.
Claim 2
Dependent Claim
85 words
A BUILT-UP GIRDER COMPRISING A ROLLED METAL STRUCTURAL SHAPE INCLUDING A PLATE WEB HAVING SUBSTANTIALLY FLAT FLANGES ON OPPOSITE EDGES THEREOF, THE GIRDER TENSION FLANGE INCLUDING A UNITARY METAL SHELL DEFINING A PERIPHERALLY CONTINUOUS HOLLOW AND HAVING ONE OF SAID STRUCTURAL SHAPE''S FLAT FLANGES FORMING A WALL PORTION OF SAID SHELL, PRESTRESSING STRANDS EXTENDING ALONG SUCH HOLLOW WITH THEIR LENGTHS SUBSTANTIALLY PARALLEL TO THE LENGTH OF THE GIRDER, AND CONCRETE IN THE HOLLOW OF SAID SHELL ENGAGED WITH SAID SHELL AND PRESTRESSED BY SAID STRANDS.
References Cited (Backward Citations)
US1546118A
Cited
FR1048852A
Cited
GB740121A
Cited
GB784383A
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GB842739A
Cited
US3140764A
Cited
FR1295131A
Cited
US3166830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |