Patent US4551100A successfully refreshed from Google Patents.
US4551100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing gingival area for dental crowns
Assignee: Ultradent Inc
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Filing: 1984-05-22
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Granted: 1985-11-05
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Expires: 2004-05-22
Abstract
Abstract A method for controlling or stopping the flow of blood is provided for use in preparing the gingival or gum area of the mouth for dental crowns. An aqueous solution of ferric sulfate (Fe 2 (SO 4 ) 3 ), having a concentration of preferably about 13% in water and glycol. The solution is applied to the gingival area and rapidly coagulates fresh blood to act as an effective astringent without adverse side effects or staining of teeth.
Inventors
- 👤 Dan E. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:56
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/33; A61K8/34; A61K8/345; A61K8/19; A61K8/23; A61Q; A61Q11/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A method for halting bleeding in gingival tissue preparatory to the taking of dental impressions, comprising the steps of: providing an applicator device capable of applying a hemostatic solution of aqueous ferric sulfate (Fe 2 (SO 4 ) 3 ) having a concentration in the range of about 6 percent to about 20 percent under pressure to an area of bleeding gingival tissue, said applicator device having a padded porous tip through which hemostatic solution may be applied; inserting the tip of the applicator into a bleeding wound site; placing the tip of the applicator device against bleeding tissue; dispensing the hemostatic agent from the tip of the applicator device under pressure onto bleeding tissue; and burnishing the bleeding tissue while simultaneously dispensing the hemostatic agent under pressure so as to halt bleeding of such tissue.
Claim 2
Independent Claim
136 words
A method for halting bleeding in gingival tissue preparatory to the taking of dental impressions, comprising the steps of: providing an applicator device capable of applying a hemostatic solution of aqueous ferric sulfate (Fe 2 (SO 4 ) 3 ) having a concentration in the range of about 6 percent to about 20 percent under pressure to an area of bleeding gingival tissue, said applicator device having a padded porous tip through which hemostatic solution may be applied; inserting the tip of the applicator into a bleeding wound site; placing the tip of the applicator device against bleeding tissue; dispensing the hemostatic agent from the tip of the applicator device under pressure onto bleeding tissue; and burnishing the bleeding tissue while simultaneously dispensing the hemostatic agent under pressure so as to halt bleeding of such tissue.
Claim 3
Dependent Claim
34 words
A method for halting bleeding in gingival tissue preparatory to the taking dental impressions as defined in claim 1, wherein the aqueous ferric sulfate solution has a ferric sulfate concentration of about 13 percent.
Claim 4
Independent Claim
115 words
A method for halting bleeding in gingival tissue preparatory to the taking dental impressions, comprising the steps of: providing an applicator device capable of controlled dispensing of an aqueous ferric sulfate (Fe 2 (SO 4 ) 3 ) solution having a concentration in the range of about 6 percent to about 20 percent through a padded tip of the applicator to an area of bleeding gingival tissue; placing the tip of the applicator device against the bleeding gingival tissue; dispensing the ferric sulfate solution into the bleeding tissue; and burnishing the bleeding gingival tissue with the tip of the applicator device while dispensing the ferric sulfate solution so as to halt bleeding of such tissue.
Claim 5
Independent Claim
115 words
A method for halting bleeding in gingival tissue preparatory to the taking dental impressions, comprising the steps of: providing an applicator device capable of controlled dispensing of an aqueous ferric sulfate (Fe 2 (SO 4 ) 3 ) solution having a concentration in the range of about 6 percent to about 20 percent through a padded tip of the applicator to an area of bleeding gingival tissue; placing the tip of the applicator device against the bleeding gingival tissue; dispensing the ferric sulfate solution into the bleeding tissue; and burnishing the bleeding gingival tissue with the tip of the applicator device while dispensing the ferric sulfate solution so as to halt bleeding of such tissue.
Claim 6
Dependent Claim
34 words
A method for halting bleeding in gingival tissue preparatory to the taking dental impressions as defined in claim 3, wherein the aqueous ferric sulfate solution has a ferric sulfate concentration of about 13 percent.
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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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |