Patent US3247639A successfully refreshed from Google Patents.
US3247639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form supporting girder for use in concrete construction
Assignee: Individual
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Filing: 1963-11-13
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Granted: 1966-04-26
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Rambelle Robert Dela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:30
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/48; E04G11/50; E04G11/54; E04G11/56; E04G2011/505
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN ADJUSTABLE CAMBERED FORM-SUPPORTING GIRDER FOR CONCRETE CONSTRUCTION COMPRISING A BOX-LIKE SECTION AND AN I-BEAM SECTION SLIDABLE LENGTHWISE WITHIN THE BOX-LIKE SECTION FOR ADJUSTMENT OF THE LENGTH OF THE GIRDER, LOCKING MEANS FOR HOLDING AN OUTER END SURFACE OF THE I-BEAM SECTION PRESSED AGAINST AN INNER SURFACE OF THE BOX-LIKE SECTION, SAID BOX-LIKE SECTION BEING CONSTRUCTED OF A SINGLE EXTRUDED MEMBER HAVING OPPOSED SIDE WALLS AND UPPER AND LOWER WALLS EXTENDING BETWEEN THE SIDE WALLS, AND AT LEAST ONE FLANGE EXTENDING LENGTHWISE OF THE BOX-LIKE SECTION AND PROJECTING UPWARDLY ABOVE SAID UPPER WALL, SAID UPWARDLY PROJECTING FLANGE BEING HIGHER TOWARD THE CENTER OF THE BOX-LIKE SECTION THAN TOWARD THE ENDS THEREOF TO PRODUCE A CHAMBER IN THE UPPERMOST SURFACE OF THE BOXLIKE SECTION WITHOUT CAMBERING SUCH SECTION AS A WHOLE.
Claim 2
Dependent Claim
130 words
AN ADJUSTABLE CAMBERED FORM-SUPPORTING GIRDER FOR CONCRETE CONSTRUCTION COMPRISING A BOX-LIKE SECTION AND AN I-BEAM SECTION SLIDABLE LENGTHWISE WITHIN THE BOX-LIKE SECTION FOR ADJUSTMENT OF THE LENGTH OF THE GIRDER, LOCKING MEANS FOR HOLDING AN OUTER END SURFACE OF THE I-BEAM SECTION PRESSED AGAINST AN INNER SURFACE OF THE BOX-LIKE SECTION, SAID BOX-LIKE SECTION BEING CONSTRUCTED OF A SINGLE EXTRUDED MEMBER HAVING OPPOSED SIDE WALLS AND UPPER AND LOWER WALLS EXTENDING BETWEEN THE SIDE WALLS, AND AT LEAST ONE FLANGE EXTENDING LENGTHWISE OF THE BOX-LIKE SECTION AND PROJECTING UPWARDLY ABOVE SAID UPPER WALL, SAID UPWARDLY PROJECTING FLANGE BEING HIGHER TOWARD THE CENTER OF THE BOX-LIKE SECTION THAN TOWARD THE ENDS THEREOF TO PRODUCE A CHAMBER IN THE UPPERMOST SURFACE OF THE BOXLIKE SECTION WITHOUT CAMBERING SUCH SECTION AS A WHOLE.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |