US4019254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endodontic operating instrument
Assignee: Individual
•
Filing: 1975-06-30
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Granted: 1977-04-26
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Expires: 1995-06-30
Abstract
Abstract An endodontic operating instrument is disclosed for utilization in the preparation of root canals, either manually or in conjunction with ultrasonic or other instrumentation. The instrument per se includes an elongate shank of virtually any cross section desired and a handle or attachment means on one end so that the instrument may be operated manually by simply grasping the handle; operated by means of a conventional dental handpiece by simply attaching the attachment means thereto; or operated by means of an ultrasonic instrument. The instruments have a coating of abrasive material applied to at least a portion of their exterior surfaces to facilitate the preparation of the root canal by the action of the abrasive on the tooth.
Inventors
- 👤 Oscar Malmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/02; A61C3/03; A61C5/00; A61C5/40; A61C5/42
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
An endodontic instrument for insertion into a root canal, comprising; A. an elongate flexible shank; B. grasping means carried on one end of said shank; C. the remaining end of said shank being blunt; and D. a quantity of abrasive material carried by said blunt end of said shank 1. whereby said blunt end of said shank may form a seat in said root canal for reception of endodontic sealing material.
Claim 2
Dependent Claim
71 words
An endodontic instrument for insertion into a root canal, comprising; A. an elongate flexible shank; B. grasping means carried on one end of said shank; C. the remaining end of said shank being blunt; and D. a quantity of abrasive material carried by said blunt end of said shank 1. whereby said blunt end of said shank may form a seat in said root canal for reception of endodontic sealing material.
Claim 3
Dependent Claim
72 words
An endodontic instrument for insertion into a root canal, comprising, A. an elongate bendable shank; B. grasping means carried on one end of said shank; and C. abrasive material carried by only a portion of the surface of said shank; D. said shank having a cross-sectional configuration such that at least one longitudinally extending, substantially straight blade edge is presented; and E. said abrasive material being carried by only the blade edge
Claim 4
Dependent Claim
72 words
An endodontic instrument for insertion into a root canal, comprising, A. an elongate bendable shank; B. grasping means carried on one end of said shank; and C. abrasive material carried by only a portion of the surface of said shank; D. said shank having a cross-sectional configuration such that at least one longitudinally extending, substantially straight blade edge is presented; and E. said abrasive material being carried by only the blade edge
Claim 5
Dependent Claim
22 words
whereby said instrument may mill the interior of the root canal and reduce the material thus milled to a relatively fine powder.
Claim 6
Dependent Claim
22 words
whereby said instrument may mill the interior of the root canal and reduce the material thus milled to a relatively fine powder.
Claim 7
Dependent Claim
81 words
An endodontic instrument for insertion into a root canal, comprising; A. an elongate bendable shank; B. grasping means carried on one end of said shank; and C. abrasive material carried by at least a portion of the surface of said shank D. said abrasive material being carried by said shank in a helical pattern about the periphery thereof 1. whereby said instrument may mill the interior of the root canal and reduce the material thus milled to a relatively fine powder.
Claim 8
Dependent Claim
81 words
An endodontic instrument for insertion into a root canal, comprising; A. an elongate bendable shank; B. grasping means carried on one end of said shank; and C. abrasive material carried by at least a portion of the surface of said shank D. said abrasive material being carried by said shank in a helical pattern about the periphery thereof 1. whereby said instrument may mill the interior of the root canal and reduce the material thus milled to a relatively fine powder.
Claim 9
Dependent Claim
57 words
An endodontic instrument for insertion into a root canal, comprising; A. an elongate bendable shank; B. grasping means carried on one end of said shank; and C. abrasive material carried by only the a portion of the surface of said shank; D. said abrasive material being carried by the surface of said shank in a random pattern
Claim 10
Dependent Claim
57 words
An endodontic instrument for insertion into a root canal, comprising; A. an elongate bendable shank; B. grasping means carried on one end of said shank; and C. abrasive material carried by only the a portion of the surface of said shank; D. said abrasive material being carried by the surface of said shank in a random pattern
Claim 11
Dependent Claim
22 words
whereby said instrument may mill the interior of the root canal and reduce the material thus milled to a relatively fine powder.
Claim 12
Dependent Claim
22 words
whereby said instrument may mill the interior of the root canal and reduce the material thus milled to a relatively fine powder.
References Cited (Backward Citations)
US1067015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |