Patent US3942903A successfully refreshed from Google Patents.
Patent US3055058A successfully refreshed from Google Patents.
US3055058A
Expired / Lapsed
US
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Process for molding a glass fiberpolyester resin article
Assignee: Individual
•
Filing: 1955-03-25
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Granted: 1962-09-25
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Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 Carroll H Van Hartesveldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:12
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/34; B29C70/345; B29C43/00; B29C43/32; B29C43/36; B29C43/3607; B29C2791/00; B29C2791/004; B29C2791/005; B29K; B29K2067/00; B29K2067/06; Y; Y10; Y10S; Y10S264/00; Y10S264/53; Y10S264/78; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A LOW PRESSURE LAMINATING PROCESS THAT COMPRISES IMPREGNATING GLASS FIBERS WITH POLYMERIZABLE UNSATURATED POLYESTER RESIN AND A COPOLYMERIZABLE MONOMER, CONFINING THE IMPREGNATED GLASS FIBERS BETWEEN RIGID MOLD MEMBERS IN A VOLUME LARGER THAN THE FINAL MOLDED VOLUME, EVACUATING THE THUS CONFINED IMPREGNATED GLASS FIBERS AT AN ELEVATED TEMPERATURE TO REMOVE ENTRAPPED NON-CONDENSABLE GASES BY PURGING THE MOLD WITH EVAPORATED MONOMER, AND APPLYING MOLDING HEAT AND PRESSURE TO THE EVACUATED IMPREGNATED GLASS FIBERS TO REDUCE THE SAME TO FINAL MOLDED VOLUME.
Claim 2
Dependent Claim
80 words
A LOW PRESSURE LAMINATING PROCESS THAT COMPRISES IMPREGNATING GLASS FIBERS WITH POLYMERIZABLE UNSATURATED POLYESTER RESIN AND A COPOLYMERIZABLE MONOMER, CONFINING THE IMPREGNATED GLASS FIBERS BETWEEN RIGID MOLD MEMBERS IN A VOLUME LARGER THAN THE FINAL MOLDED VOLUME, EVACUATING THE THUS CONFINED IMPREGNATED GLASS FIBERS AT AN ELEVATED TEMPERATURE TO REMOVE ENTRAPPED NON-CONDENSABLE GASES BY PURGING THE MOLD WITH EVAPORATED MONOMER, AND APPLYING MOLDING HEAT AND PRESSURE TO THE EVACUATED IMPREGNATED GLASS FIBERS TO REDUCE THE SAME TO FINAL MOLDED VOLUME.
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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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |