US4995812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of obtaining usable hydrocolloid impression material
Assignee: REYNOLDS FRED W
•
Filing: 1989-11-02
•
Granted: 1991-02-26
•
Expires: 2009-11-02
Abstract
Abstract A method of obtaining hydrocolloid impression material to be used in conjunction with making dental impressions where a quantity of the hydrocolloid impression material in solid form is cut into a mass of small parts. This mass of small parts is then heated within a microwave oven until the mass is liquefied and achieves a homogeneous consistency. The liquid mass is then poured into a tray and tempered and then utilized to make a desired dental impression.
Inventors
- 👤 Fred W. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
A; A61; A61C; A61C9/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A method of obtaining usable hydrocolloid impression material comprising the steps of: acquiring a solid block of hydrocolloid at around room temperature; cutting said block into a mass of individual small parts; subjecting said parts to microwave energy for a predetermined length of time until said parts are completely melted and intermixed forming a homogeneous liquid mass at an elevated temperature; pouring said liquid mass into a tray; tempering said liquid mass to a temperature which would be acceptable to the tissue within the mouth of a human being; inserting said tempered mass and said tray into the mouth of the human being and applying said tempered mass against a particular area of the mouth to make an impression of the area of the mouth within said tempered mass; and utilizing of said impression to construct a dental appliance.
Claim 2
Independent Claim
139 words
A method of obtaining usable hydrocolloid impression material comprising the steps of: acquiring a solid block of hydrocolloid at around room temperature; cutting said block into a mass of individual small parts; subjecting said parts to microwave energy for a predetermined length of time until said parts are completely melted and intermixed forming a homogeneous liquid mass at an elevated temperature; pouring said liquid mass into a tray; tempering said liquid mass to a temperature which would be acceptable to the tissue within the mouth of a human being; inserting said tempered mass and said tray into the mouth of the human being and applying said tempered mass against a particular area of the mouth to make an impression of the area of the mouth within said tempered mass; and utilizing of said impression to construct a dental appliance.
Claim 3
Dependent Claim
18 words
The method as defined in claim 1 wherein; said cutting step is accomplished by grating of said block.
Claim 4
Dependent Claim
28 words
The method as defined in claim 2 wherein: the grated said small parts are each of the approximate size of two millimeters by four millimeters by ten millimeters.
Claim 5
Dependent Claim
19 words
The method as defined in claim 1 wherein: said elevated temperature is at least one hundred fifty degrees Fahrenheit.
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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |