Patent US2372377A successfully refreshed from Google Patents.
Patent US3140764A successfully refreshed from Google Patents.
US3140764A
Expired / Lapsed
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Prestressed girder member
Assignee: Individual
•
Filing: 1960-03-17
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Granted: 1964-07-14
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Expires: 1980-03-17
Abstract
No abstract record available.
Inventors
- 👤 David B Cheskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:28
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/10; E04C2003/0486; E04C2003/0491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A NON-ARCH FORM PRESTRESSED GIRDER MEMBER COMPRISING IN COMBINATION, AN UPPER FLANGE SECTION, A WEB SECTION, A CONTINUOUS LOWER SECTION OF RELATIVELY LOW CROSSSECTIONAL AREA HAVING AN EXTENDED WIDTH AND PROVIDING A LARGER RADIUS OF GYRATION ABOUT A CENTRAL VERTICAL AXIS THAN SAID UPPER FLANGE SECTION, TENSILE MEANS HAVING A GREATER ELASTIC LIMIT THAN ANY OF THE OTHER SECTIONS OF SAID GIRDER MEMBER HAVING ADJUSTABLE TENSIONING MEANS CONNECTING THEREWITH, AND MEANS ATTACHING SAID TENSILE MEANS TO THE ENDS OF SAID LOWER EXTENDED WIDTH SECTION WHILE EXTENDING PARALLEL THEREWITH ACROSS AT LEAST A MID-PORTION OF THE LENGTH OF SAID GIRDER MEMBER.
Claim 2
Dependent Claim
100 words
A NON-ARCH FORM PRESTRESSED GIRDER MEMBER COMPRISING IN COMBINATION, AN UPPER FLANGE SECTION, A WEB SECTION, A CONTINUOUS LOWER SECTION OF RELATIVELY LOW CROSSSECTIONAL AREA HAVING AN EXTENDED WIDTH AND PROVIDING A LARGER RADIUS OF GYRATION ABOUT A CENTRAL VERTICAL AXIS THAN SAID UPPER FLANGE SECTION, TENSILE MEANS HAVING A GREATER ELASTIC LIMIT THAN ANY OF THE OTHER SECTIONS OF SAID GIRDER MEMBER HAVING ADJUSTABLE TENSIONING MEANS CONNECTING THEREWITH, AND MEANS ATTACHING SAID TENSILE MEANS TO THE ENDS OF SAID LOWER EXTENDED WIDTH SECTION WHILE EXTENDING PARALLEL THEREWITH ACROSS AT LEAST A MID-PORTION OF THE LENGTH OF SAID GIRDER MEMBER.
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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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |