US3284971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural elements for metal framing systems
Assignee: Individual
•
Filing: 1959-08-11
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Granted: 1966-11-15
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Expires: 1979-08-11
Abstract
No abstract record available.
Inventors
- 👤 Warren R Attwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:34
CPC Classifications
A; A47; A47B; A47B96/00; A47B96/14; A47B96/1408
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN AN ELONGATED UNITARY LOAD-SUPPORTING METAL FRAME MEMBER FOR AN ADJUSTABLE METAL FRAMING CONSTRUCTION, SAID FRAME MEMBER HAVING ONE OR MORE FLAT SIDES, A PLURALITY OF SPACED REMOVABLE KNOCK-OUTS PROVIDED IN AT LEAST ONE OF SAID SIDES AND FORMING A HOLE THEREON WHEN REMOVED, EACH OF SAID KNOCK-OUTS BEING COMPLETELY SEVERED FROM SAID MEMBER FOR AT LEAST THE MAJOR PORTION OF THE COMMON PERIPHERY OF THE KNOCK-OUT AND THE ASSOCIATED HOLE, SAID KNOCK-OUT BEING SUBSTANTIALLY COPLANAR WITH SAID SIDE AND THE EDGE OF SAID KNOCK-OUT CLOSELY CONTACTING THE SIDE OF SAID HOLE WHEREBY SAID FRAME MEMBER PRESENTS A SUBSTANTIALLY SMOOTH SURFACE AND EACH SAID KNOCK-OUT WHEN RETAINED CONTRIBUTES TO THE STRENGTH AND RIGIDITY OF THE FRAME MEMBER, SAID KNOCK-OUTS WHEN REMOVED PROVIDING OPTIONAL HOLES FOR THE ATTACHMENT OF ADDITIONAL FRAME MEMBERS TO SAID FRAME MEMBER.
Claim 2
Dependent Claim
135 words
IN AN ELONGATED UNITARY LOAD-SUPPORTING METAL FRAME MEMBER FOR AN ADJUSTABLE METAL FRAMING CONSTRUCTION, SAID FRAME MEMBER HAVING ONE OR MORE FLAT SIDES, A PLURALITY OF SPACED REMOVABLE KNOCK-OUTS PROVIDED IN AT LEAST ONE OF SAID SIDES AND FORMING A HOLE THEREON WHEN REMOVED, EACH OF SAID KNOCK-OUTS BEING COMPLETELY SEVERED FROM SAID MEMBER FOR AT LEAST THE MAJOR PORTION OF THE COMMON PERIPHERY OF THE KNOCK-OUT AND THE ASSOCIATED HOLE, SAID KNOCK-OUT BEING SUBSTANTIALLY COPLANAR WITH SAID SIDE AND THE EDGE OF SAID KNOCK-OUT CLOSELY CONTACTING THE SIDE OF SAID HOLE WHEREBY SAID FRAME MEMBER PRESENTS A SUBSTANTIALLY SMOOTH SURFACE AND EACH SAID KNOCK-OUT WHEN RETAINED CONTRIBUTES TO THE STRENGTH AND RIGIDITY OF THE FRAME MEMBER, SAID KNOCK-OUTS WHEN REMOVED PROVIDING OPTIONAL HOLES FOR THE ATTACHMENT OF ADDITIONAL FRAME MEMBERS TO SAID FRAME MEMBER.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |