Patent US5397361A successfully refreshed from Google Patents.
US5397361A
Expired / Lapsed
US
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Cranioplasty surgical procedure and kit
Assignee: Surgical Prosthetics Resource Inc
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Filing: 1993-06-23
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Granted: 1995-03-14
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Expires: 2013-06-23
Abstract
Abstract A process of producing a cranial plate duplicating the dimensions of an excised portion of the cranium comprising, obtaining an excised portion of the cranium of a patient, preparing a three-dimensional impression of the excised portion in an impression material, removing the excised portion of the patient's cranium from the impression material to provide a mold cavity, and thereafter filling the cavity with a sterile resinous material which sets, and thereafter removing the set resinous material to form a plate duplicating the dimensions of the excised portion of the patient's cranium, and finally surgically installing the plate in the patient's cranium to replace the excised portion of the cranium earlier removed.
Inventors
- 👤 Dennis E. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/3094; A61F2/30942; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/80; A61B17/8061; A61F2/28; A61F2/2875; A61L; A61L27/00; A61L27/14; A61L27/16; A61B17/88; A61B17/8863; A61F2002/30957; Y; Y10; Y10S; Y10S264/00; Y10S264/30; Y10S623/00; Y10S623/901; Y10S623/912; Y10S623/914
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
134 words
A process of producing a cranial plate duplicating the dimensions of an excised portion of the cranium, said process comprising; obtaining an excised portion of the cranium of a patient; preparing a 3-dimensional impression of said excised portion of the cranium in an impression material; removing the excised portion of the patient's cranium from the impression material to provide a mold cavity of the excised cranial portion of the patient; filling said mold cavity of said impression material with a sterile resinous material; allowing the resinous material to set; removing the set resinous material which is in the form of a plate duplicating the dimensions of the excised portion of the patient's cranium; and, surgically installing said plate to the cranium of the patient from whom the excised portion of the cranium was removed.
Claim 2
Dependent Claim
134 words
A process of producing a cranial plate duplicating the dimensions of an excised portion of the cranium, said process comprising; obtaining an excised portion of the cranium of a patient; preparing a 3-dimensional impression of said excised portion of the cranium in an impression material; removing the excised portion of the patient's cranium from the impression material to provide a mold cavity of the excised cranial portion of the patient; filling said mold cavity of said impression material with a sterile resinous material; allowing the resinous material to set; removing the set resinous material which is in the form of a plate duplicating the dimensions of the excised portion of the patient's cranium; and, surgically installing said plate to the cranium of the patient from whom the excised portion of the cranium was removed.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the impression material is an alginate impression material.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the mold cavity has a top half and a separable bottom mold half.
Claim 5
Dependent Claim
43 words
The process of claim 2 wherein the alginate impression material while still pourable and before it becomes dough-like is poured in the bottom mold half with the two halves being joined to prepare an impression of the excised portion of the cranial plate.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein the mold after being joined is allowed to set for at least three minutes.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein the sterile resinous material is a polymethylmethacrylate resin.
Claim 8
Dependent Claim
24 words
The process of claim 6 wherein the sterile resinous material is allowed to cure in the impression mold for from 20 to 30 minutes.
Claim 9
Independent Claim
49 words
A method of performing cranioplasty surgery, comprising: removing a cranial plate from a patient; preparing prior to any replacement surgery for said plate an exact duplicate of the removed patient's own cranial plate; and thereafter, surgically replacing the removed plate with a precast prosthesis duplicate of the removed plate.
Claim 10
Independent Claim
49 words
A method of performing cranioplasty surgery, comprising: removing a cranial plate from a patient; preparing prior to any replacement surgery for said plate an exact duplicate of the removed patient's own cranial plate; and thereafter, surgically replacing the removed plate with a precast prosthesis duplicate of the removed plate.
Claim 11
Dependent Claim
14 words
The method of claim 8 wherein the impression material is an alginate impression material.
Claim 12
Dependent Claim
19 words
The method of claim 9 wherein the mold cavity has a top half and a separable bottom mold half.
Claim 13
Dependent Claim
51 words
The method of claim 10 wherein the alginate gel material while still pourable and before it becomes dough-like is poured partially in the top mold half and partially in the bottom mold half with the two halves being joined to prepare an impression of the excised portion of the cranial plate.
Claim 14
Dependent Claim
20 words
The method of claim 11 wherein the mold after being joined is allowed to set for at least three minutes.
References Cited (Backward Citations)
US1556802A
Cited
US1027016A
Cited
US1700844A
Cited
US2907067A
Cited
US4941212A
Cited
US4335067A
Cited
US4708836A
Cited
US4828116A
Cited
US5076438A
Cited
US5108686A
Cited
US5124106A
Cited
US5218975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |