Patent US3709719A successfully refreshed from Google Patents.
US3709719A
Expired / Lapsed
US
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Process for polymerizing impregnated monomer and material prepared thereby
Assignee: Radiation Technology Inc
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Filing: 1969-08-15
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Granted: 1973-01-09
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Expires: 1989-08-15
Abstract
Abstract A PROCESS FOR PRODUCING MATERIALS HAVING IMPROVED MECHANICAL PROPERTIES AND AN ESTHETICALLY APPEALING APPEARANCE INCLUDES INPREGNATING A SUBJECT MASONRY MATERIAL WITH A RADIATION POLYMERIZABLE MONOMER, AND SUBSEQUENTIALLY POLYMERIZING THE MONOMER BY IRRADIATION. IN ACCORDANCE WITH ONE ASPECT OF THE INVENTION, THE IMPREGNATION IS EFFECTED BY DRAWING THE MONOMER INTO AND ABOUT THE SUBJECT MATERIAL IN A VACUUM CHAMBER. THE CHAMBER AND ITS CONTENTS ARE THEN EXPOSED TO GAMMA RADIATION OF CONTROLLED DOSAGE SUCH THAT THE MONOMER IMPREGNAYED WITHIN THE MASONRY MATERIAL POLYMERIZES, WHILE THE MONOMER BATH DOES NOT.
Inventors
- 👤 M Welt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:31
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/60; C04B41/61; C04B41/62; C04B41/63; C04B2111/00; C04B2111/80
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |