US3814619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of structural materials
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1971-03-05
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Granted: 1974-06-04
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Expires: 1991-03-05
Abstract
Abstract A PROCESS FOR THE MANUFACTURE OF STRUCTURAL MATERIALS FOR USE IN THE CIVIL ENGINEERING AND CONSTRUCTION WORK IN WHICH A POROUS BASE MATERIAL IMPREGNATED WITH A POLYMERIZABLE SUSTANCE OR ITS MIXTURE, OPTIONALLY TOGETHER WITH A SPECIFIC ADDITIVE OR ADDITIVES IS IMMERSED IN A LIQUID OF HIGH VISCOSITY WHICH IS SUBSTANTIALLY NON-REACTIVE OR IMMISCIBLE WITH SAID POLYMERIZABLE SUBSTANCE, AND THE POLYMERIZABLE SUBSTANCE IN THUS-IMMERSED BASE MATERIAL IS REACTED TOGETHER IN THE PRESENCE OF A POLYMERIZATION CATALYST TO OBTAIN A STRUCTUAL MATERIAL CONTAINING A REACTION PRODUCT OF THE POLYMERIZABLE SUBSTANCE INTEGRALLY INCORPORATED WITH THE BASE MATERIAL.
Inventors
- 👤 S Kobayashi
- 👤 C Hoshino
- 👤 H Kunisaki
- 👤 E Tazawa
- 👤 M Matsunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/60; C04B41/61; C04B41/62; C04B41/63
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |