US3607996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing dentures
Assignee: Individual
•
Filing: 1969-11-24
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Granted: 1971-09-21
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Expires: 1989-11-24
Abstract
Abstract A method of processing dentures wherein the physical-chemical volumetric expansion and contraction of the polymerization investing compound is controlled by utilizing layered silicone to separate the denture resins from the mold surfaces and by removing the resin-filled plaster or stone casts as a unitary unit from the compression flask, placing said unit under yieldable pressure and subjecting such unit to a predetermined pressure and temperature for completing its curing cycle within a shortened period of time.
Inventors
- 👤 Alexander B Pickands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:33
CPC Classifications
A; A61; A61C; A61C13/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
50 words
A method of making a denture as defined by claim 1 wherein the resilient compression of the deflasked cast will permit volumetric expansion and contraction of the investing medium during its polymerization, and wherein the pressure vessel is charged to 24 lb. pressure during the heating of the fluid therein.
Claim 2
Dependent Claim
46 words
A method of making a denture as defined by claim 1 wherein the resiliently compressed cast is placed in a preheated fluid-filled pressure vessel and is heated to a temperature in the range of 150* to 164* F. for polymerization of the temperature cured investing medium.
Claim 3
Dependent Claim
46 words
A method of making a denture as defined by claim 2 wherein the resiliently compressed cast is placed in a preheated fluid-filled pressure vessel and is heated to a temperature in the range of 150* to 164* F. for polymerization of the temperature cured investing medium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |