Patent US3306641A successfully refreshed from Google Patents.
US3306641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handrail
Assignee: Blumcraft of Pittsburgh LP
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Filing: 1964-09-01
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Granted: 1967-02-28
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Blum Louis
- 👤 Jr William J Horgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:59
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836; E04F11/1838; Y; Y10; Y10T; Y10T403/00; Y10T403/44; Y10T403/447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A HANDRAIL AND SUPPORTING STRUCTURE THEREFOR, THE COMBINATION COMPRISING A HANDRAIL UNIFORM IN TRANSVERSE SECTION AND HAVING A LONGITUDINALLY EXTENDING SLOT WITH PARALLEL OPPOSITE SIDE WALLS IN THE UNDERSURFACE THEREOF, A SUPPORT BRACKET INCLUDING TWO SEPARABLE PARTS DISPOSED BACK TO BACK WITH THEIR UPPER END PORTIONS IN SAID SLOT AND RESPECTIVELY ADJACENT THE OPPOSITE SIDE WALLS OF SAID SLOT, LONGITUDINALLY EXTENDING SERRATIONS ON BOTH SIDE WALLS OF THE SLOT, AND SERRATIONS ON THE REMOTE FACES OF THE BRACKET PARTS SELECTIVELY INTERENGAGED WITH OPPOSED ONES OF THE SERRATIONS ON THE SIDE WALLS OF THE SLOT WHEREBY TO SUPPORT SAID RAILING WITHOUT TILTING THE SAME TO ONE SIDE, AND SELECTIVELY INTERENGAGEABLE WITH POSITIONALLY OFFSET SERRATIONS RESPECTIVELY ON THE SIDE WALLS OF THE SLOT WHEREBY TO TILT SAID RAILING TO ONE SIDE.
Claim 2
Dependent Claim
130 words
IN A HANDRAIL AND SUPPORTING STRUCTURE THEREFOR, THE COMBINATION COMPRISING A HANDRAIL UNIFORM IN TRANSVERSE SECTION AND HAVING A LONGITUDINALLY EXTENDING SLOT WITH PARALLEL OPPOSITE SIDE WALLS IN THE UNDERSURFACE THEREOF, A SUPPORT BRACKET INCLUDING TWO SEPARABLE PARTS DISPOSED BACK TO BACK WITH THEIR UPPER END PORTIONS IN SAID SLOT AND RESPECTIVELY ADJACENT THE OPPOSITE SIDE WALLS OF SAID SLOT, LONGITUDINALLY EXTENDING SERRATIONS ON BOTH SIDE WALLS OF THE SLOT, AND SERRATIONS ON THE REMOTE FACES OF THE BRACKET PARTS SELECTIVELY INTERENGAGED WITH OPPOSED ONES OF THE SERRATIONS ON THE SIDE WALLS OF THE SLOT WHEREBY TO SUPPORT SAID RAILING WITHOUT TILTING THE SAME TO ONE SIDE, AND SELECTIVELY INTERENGAGEABLE WITH POSITIONALLY OFFSET SERRATIONS RESPECTIVELY ON THE SIDE WALLS OF THE SLOT WHEREBY TO TILT SAID RAILING TO ONE SIDE.
References Cited (Backward Citations)
US1654751A
Cited
US2846250A
Cited
US2941591A
Cited
US2924089A
Cited
US2904314A
Cited
US2963275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |