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US3731453A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for preparing syringe type vials of hydrocolloid impression material

Assignee: Van R Dental Products Inc
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Filing: 1971-01-26
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Granted: 1973-05-08
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Expires: 1991-01-26
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Abstract

Abstract A method is provided for preparing an enclosed vial of reversible hydrocolloid dental impression material which includes the step of positioning a stopper a sufficient distance within the vial to permit expansion of the impression material upon subsequent heating of the vial without ejecting the stopper from the vial. The vial, which may take the form of an open ended tube having an enlarged portion terminating at one end in shoulder, neck and rim portions, is initially loaded by a multi-step process which includes (a) inserting a stopper through the enlarged portion until it engages The shoulder portion, (b) placing the open end of the enlarged portion in abutment with a substantially flat surface and (c) filling the vial through the rim and neck portions with hydrocolloid under sufficient pressure to move the stopper through the enlarged portion and into abutment with the substantially flat surface. In a second embodiment, the aforementioned vial is initially loaded by a multi-step process which includes (a) inserting a stopper into the enlarged portion until the rearward end of the stopper is substantially aligned with the lip of the enlarged portion, (b) placing the closed end of the enlarged portion in abutment with a substantially flat surface, (c) inserting a filling tip through the rim portion until it is in juxtaposition to the stopper and (d) filling the vial through the filling tip while simultaneously withdrawing the filling tip from the vial. After the vial is filled with hydrocolloid impression material, the stopper is moved into the vial a sufficient distance to accommodate expansion of the impression material when the vial is heated to 212* F. to condition the material for further use. Following this step the rim portion of the vial is closed with a needle permeable cap.

Inventors

  • 👤 D Porteous

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 10:55
CPC Classifications
A; A61; A61M; A61M5/00

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 226 words
A method for preparing an enclosed vial of reversible hydrocolloid impression material wherein the vial is an openended tube having an enlarged portion terminating at one end in a shoulder portion, neck portion and rim portion which comprises: inserting a stopper into the open end of the enlarged portion of the vial and moving the stopper in said vial until the forward end of the stopper engages the shoulder of the vial; placing the open end of the enlarged portion of the vial in abutment with a substantially flat surface; inserting a filling tip through the rim and neck portions of the vial until the filling tip is in juxtaposition to the stopper, sealing the lip of the rim portion of the vial with respect to the filling tip and filling said vial through said filling tip with reversible hydrocolloid impression material under sufficient pressure to move the stopper through the enlarged portion of the vial and into abutment with the substantially flat surface; unsealing and removing the filling tip from the rim and neck portions of the vial; moving said stopper inwardly in said vial a sufficient distance to expel air and permit expansion of the impression material upon subsequent heating of the vial without ejecting the stopper from the vial, and, Thereafter, capping the open end of the vial with a needle permeable cap.
Claim 2
Independent Claim 226 words
A method for preparing an enclosed vial of reversible hydrocolloid impression material wherein the vial is an openended tube having an enlarged portion terminating at one end in a shoulder portion, neck portion and rim portion which comprises: inserting a stopper into the open end of the enlarged portion of the vial and moving the stopper in said vial until the forward end of the stopper engages the shoulder of the vial; placing the open end of the enlarged portion of the vial in abutment with a substantially flat surface; inserting a filling tip through the rim and neck portions of the vial until the filling tip is in juxtaposition to the stopper, sealing the lip of the rim portion of the vial with respect to the filling tip and filling said vial through said filling tip with reversible hydrocolloid impression material under sufficient pressure to move the stopper through the enlarged portion of the vial and into abutment with the substantially flat surface; unsealing and removing the filling tip from the rim and neck portions of the vial; moving said stopper inwardly in said vial a sufficient distance to expel air and permit expansion of the impression material upon subsequent heating of the vial without ejecting the stopper from the vial, and, Thereafter, capping the open end of the vial with a needle permeable cap.
Claim 3
Dependent Claim 43 words
A method according to claim 1 wherein a member, in fixed position, engages the stopper and a force is applied to the other end of the vial for moving said vial towards said member whereby said stopper is moved inwardly in said vial.
Claim 4
Dependent Claim 38 words
A method according to claim 2 wherein the stopper is moved inwardly in said vial for a distance which substantially corresponds to the expansion of reversible hydrocolloid impression material contained in said vial when heated to 212* F.
Claim 5
Independent Claim 180 words
A method for preparing an enclosed vial of reversible hydrocolloid impression material wherein the vial is an openended tube of substantially uniform diameter having a filling end and a non-filling end and provided with a stopper near the filling end, which comprises: placing the non-filling end of the vial in abutment with a substantially flat surface; inserting a filling tip through the filling end of the vial until the filling tip is in juxtaposition to the stopper, sealing the lip of the filling end of the vial with respect to the filling tip and filling said vial through said filling tip with reversible hydrocolloid impression material under sufficient pressure to move the stopper through the vial and into abutment with the substantially flat surface; unsealing and removing the filling tip from the vial; moving said stopper inwardly in said vial a sufficient distance to expel air and permit expansion of the impression material upon subsequent heating of the vial without ejecting the stopper from the vial, and thereafter, capping the filling end of the vial with a needle permeable cap.
Claim 6
Independent Claim 180 words
A method for preparing an enclosed vial of reversible hydrocolloid impression material wherein the vial is an openended tube of substantially uniform diameter having a filling end and a non-filling end and provided with a stopper near the filling end, which comprises: placing the non-filling end of the vial in abutment with a substantially flat surface; inserting a filling tip through the filling end of the vial until the filling tip is in juxtaposition to the stopper, sealing the lip of the filling end of the vial with respect to the filling tip and filling said vial through said filling tip with reversible hydrocolloid impression material under sufficient pressure to move the stopper through the vial and into abutment with the substantially flat surface; unsealing and removing the filling tip from the vial; moving said stopper inwardly in said vial a sufficient distance to expel air and permit expansion of the impression material upon subsequent heating of the vial without ejecting the stopper from the vial, and thereafter, capping the filling end of the vial with a needle permeable cap.

References Cited (Backward Citations)

US2823500A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-05-07 1976-11-06 1977-05-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-07 1980-11-06 1981-05-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-07 1984-11-06 1985-05-08 $7700.00 Window Closed / Lapsed

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