Patent US4377381A successfully refreshed from Google Patents.
US4377381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Home care denture cleaning tool
Assignee: Individual
•
Filing: 1981-10-14
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Granted: 1983-03-22
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Expires: 2001-10-14
Abstract
Abstract The tool is designed for use by a denture wearer after the chemical cleaning of the denture or partial denture in the home. The tool is a double ended instrument with two blades mounted on opposite ends of an elongated handle, which handle preferably has a square cross-section and is made of plastic. One blade is spear-shaped and sharpened to a knife edge along its leading edges and at its apex. The second blade has a convex concave configuration and a rounded tip with all edges of this blade including its rounded tip sharpened to a knife edge.
Inventors
- 👤 Robert E. Westman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:26
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/036
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A denture cleaning tool for use by denture wearers comprising: an elongated handle to be held in the hand of a user, a first generally flat blade secured to one end of the elongated handle for cleaning interproximal spaces and cervical areas of teeth on a denture, said first blade having a sharp pointed apex and two edges leading to said apex forming an angle of approximately 60° and the two edges leading to said apex being sharpened to a knife edge, and a second generally flat blade secured to the opposite end of said handle for cleaning flanges and palatal areas on a denture, said second blade having a concave convex configuration and a semicircular forward tip, the two edges and tip of said second blade being sharpened to a knife edge.
Claim 2
Dependent Claim
133 words
A denture cleaning tool for use by denture wearers comprising: an elongated handle to be held in the hand of a user, a first generally flat blade secured to one end of the elongated handle for cleaning interproximal spaces and cervical areas of teeth on a denture, said first blade having a sharp pointed apex and two edges leading to said apex forming an angle of approximately 60° and the two edges leading to said apex being sharpened to a knife edge, and a second generally flat blade secured to the opposite end of said handle for cleaning flanges and palatal areas on a denture, said second blade having a concave convex configuration and a semicircular forward tip, the two edges and tip of said second blade being sharpened to a knife edge.
Claim 3
Dependent Claim
36 words
A denture cleaning tool according to claim 1, in which the overall length of the tool is approximately 41/2 inches, the first blade is 3/4 of an inch long, and the second blade 11/2 inches long.
Claim 4
Dependent Claim
29 words
A denture cleaning tool according to claim 1 or 2, in which the semicircular forward tip of the second blade has a diameter of approximatley 3/16 of an inch.
Claim 5
Dependent Claim
40 words
A denture cleaning tool according to claim 1 in which the two leading edges of the first blade and the two edges and tip of the second blade are honed to knife edge sharpness from both sides of the blade.
Claim 6
Dependent Claim
25 words
A denture cleaning tool according to claim 1 in which both blades are made from flat stainless steel stock having a thickness of 0.05 inches.
Claim 7
Dependent Claim
28 words
A denture cleaning tool according to claim 1 in which the elongated handle has a rectangular cross-section approximately 3/8 by 7/16 inches and is made of thermoplastic material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |