USRE28502E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intramedullary rod
Assignee: Kirschner Medical Corp
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Filing: 1974-05-06
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Granted: 1975-08-05
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Expires: 1994-05-06
Abstract
Abstract An intramedullary rod for internal fixation of long bone fractures in the form of an elongated hollow tube having longitudinal flutes about the periphery. Each end is (castellated) formed to provide (alternate) a plurality of sharp cutting surfaces and an angled face guide (projections) means to facilitate emplacement in the medullary canal.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/7283
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
An intramedullary rod for fracture fixation comprising an elongated hollow tube open at each end and hollow throughout, said tube having at least one end surface castellated and defined by a plurality of longitudinal projections, a first group of said projections having pointed, relatively sharp, end surfaces defining cutting faces, a second group of said projections being spaced alternately with said first set of projections and having angled flat end surfaces defining guiding faces.
Claim 2
Dependent Claim
74 words
An intramedullary rod for fracture fixation comprising an elongated hollow tube open at each end and hollow throughout, said tube having at least one end surface castellated and defined by a plurality of longitudinal projections, a first group of said projections having pointed, relatively sharp, end surfaces defining cutting faces, a second group of said projections being spaced alternately with said first set of projections and having angled flat end surfaces defining guiding faces.
Claim 3
Dependent Claim
17 words
An intramedullary rod as defined in claim 1, wherein each end surface of said tube is castellated.
Claim 4
Dependent Claim
26 words
An intramedullary rod as defined in claim 1, wherein said tube is provided with a plurality of longitudinally extending elongated flutes about the external surface thereof.
Claim 5
Dependent Claim
20 words
An intramedullary rod as defined in claim 3, wherein the flutes extend longitudinally and join the first group of projections.
Claim 6
Dependent Claim
86 words
An intramedullary rod for fracture fixation comprising an elongated tube open at each end and hollow throughout, a plurality of longitudinally extending elongated flutes about the external surface of said tube, on at least one end face of said tube the flutes being sharply sloped inwardly at an acute angle to define a plurality of cutting surfaces, the tube portions intermediate said flutes having their end surfaces on said one end face sloped gradually inwardly at an obtuse angle to define a plurality of guide surfaces.
Claim 7
Dependent Claim
86 words
An intramedullary rod for fracture fixation comprising an elongated tube open at each end and hollow throughout, a plurality of longitudinally extending elongated flutes about the external surface of said tube, on at least one end face of said tube the flutes being sharply sloped inwardly at an acute angle to define a plurality of cutting surfaces, the tube portions intermediate said flutes having their end surfaces on said one end face sloped gradually inwardly at an obtuse angle to define a plurality of guide surfaces.
Claim 8
Dependent Claim
24 words
An intramedullary rod as defined in claim 5 and including a rectangular slot in the tube wall surface for reception of a retraction tool.
Claim 9
Dependent Claim
82 words
An intramedullary rod for fracture fixation comprising an elongated tube open at each end and hollow throughout, a plurality of longitudinally extending elongated flutes about the external surface of said tube, on at least one end face of said tube the flutes being sharply sloped inwardly at an acute angle to define a plurality of cutting surfaces, guide means extending axially from said one end face beyond said cutting surfaces and having a guide surface sloped gradually inwardly at an obtuse angle.
Claim 10
Dependent Claim
82 words
An intramedullary rod for fracture fixation comprising an elongated tube open at each end and hollow throughout, a plurality of longitudinally extending elongated flutes about the external surface of said tube, on at least one end face of said tube the flutes being sharply sloped inwardly at an acute angle to define a plurality of cutting surfaces, guide means extending axially from said one end face beyond said cutting surfaces and having a guide surface sloped gradually inwardly at an obtuse angle.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |