US4787146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife with chisel edge
Assignee: Individual
•
Filing: 1983-01-27
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Granted: 1988-11-29
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Expires: 2003-01-27
Abstract
Abstract A knife includes a handle and a blade with the blade having a handle enclosed portion and a first sharp edge including a substantially linear edge portion and a curved end portion; a second sharp or chisel edge of linear configuration extends in from an opposite flat back edge. A flat linear guide edge surface extends between the outer end of the curved end portion and the inner end of the second shaft edge and is oriented relative to the second edge at an angle in the range of 75° to 85°.
Inventors
- 👤 Thomas Gaskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:48
CPC Classifications
B; B26; B26B; B26B11/00; B26B11/006; A; A47; A47J; A47J17/00; A47J17/02; B25; B25D; B25D3/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A knife including a handle and a blade, said blade comprising a metal blade having a handle enclosed portion, a first sharp edge having a substantially linear edge portion and a curved end portion, a second sharp or chisel edge having first and second ends and extending in a linear manner substantially perpendicular to said linear edge, and a flat linear guide edge surface extending between one end of said curved end portion and said first end of said second sharp edge.
Claim 2
Dependent Claim
82 words
A knife including a handle and a blade, said blade comprising a metal blade having a handle enclosed portion, a first sharp edge having a substantially linear edge portion and a curved end portion, a second sharp or chisel edge having first and second ends and extending in a linear manner substantially perpendicular to said linear edge, and a flat linear guide edge surface extending between one end of said curved end portion and said first end of said second sharp edge.
Claim 3
Dependent Claim
102 words
A knife including a handle and a blade, said blade comprising a metal blade having a handle enclosed portion, a first sharp edge having a substantially linear edge portion and a curved end portion, a second sharp or chisel edge having first and second ends and extending in a linear manner substantially perpendicular to said linear edge, and a flat linear guide edge surface extending between one end of said curved end portion and said first end of said second sharp edge, and a flat back edge extending between said second end of said second sharp edge and said handle enclosed portion.
Claim 4
Dependent Claim
102 words
A knife including a handle and a blade, said blade comprising a metal blade having a handle enclosed portion, a first sharp edge having a substantially linear edge portion and a curved end portion, a second sharp or chisel edge having first and second ends and extending in a linear manner substantially perpendicular to said linear edge, and a flat linear guide edge surface extending between one end of said curved end portion and said first end of said second sharp edge, and a flat back edge extending between said second end of said second sharp edge and said handle enclosed portion.
Claim 5
Dependent Claim
27 words
A knife as recited in claim 2 wherein said linear edge portion of said sharp edge and said flat back edge are substantially parallel to each other.
Claim 6
Dependent Claim
31 words
A knife as recited in claim 3 wherein the angle between said linear guide edge surface and said second sharp or chisel edge is in the range of 75° to 85°.
Claim 7
Dependent Claim
25 words
A knife as recited in claim 2 wherein said flat back edge and said second sharp or chisel edge are substantially perpendicular to each other.
Claim 8
Dependent Claim
28 words
A knife as recited in claim 5 wherein said linear edge portion of said sharp edge and said flat back edge are substantially parallel each to the other.
Claim 9
Dependent Claim
31 words
A knife as recited in claim 6 wherein the angle between said linear guide edge surface and said second sharp or chisel edge is in the range of 75° to 85°.
Claim 10
Dependent Claim
24 words
A knife as recited in claim 2 wherein the extreme outer end of said curved end portion is coplanar with said flat back edge.
Claim 11
Dependent Claim
27 words
A knife as recited in claim 8 wherein said linear edge portion of said sharp edge and said flat back edge are substantially parallel to each other.
Claim 12
Dependent Claim
31 words
A knife as recited in claim 9 wherein the angle between said linear guide edge surface and said second sharp or chisel edge is in the range of 75° to 85°.
Claim 13
Dependent Claim
25 words
A knife as recited in claim 10 wherein said flat back edge and said second sharp or chisel edge are substantially perpendicular to each other.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |