US3865779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing reinforcing additives to be applied to inorganic cements
Assignee: Individual
•
Filing: 1972-05-05
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Granted: 1975-02-11
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Expires: 1992-05-05
Abstract
Abstract Additives for preparing reinforced inorganic cements are prepared by combining certain polymers, inorganic materials or cement and a surfactant, mixing and melting the above mixture and then extruding it into fibers of desired shape. The resultant fibers are excellent reinforcing additives for inorganic cements.
Inventors
- 👤 Seigo Oya
- 👤 Hiroo Noro
- 👤 Kisaburo Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:35
CPC Classifications
C; C04; C04B; C04B16/00; C04B16/04; C04B16/06; A; A01; A01B; A01B39/00; A01B39/02; A01B39/06; D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; D01F; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
AN ORGANIC CEMENT REINFORCING ADDITIVE IN FIBER FORM CONSISTING ESSENTIALLY OF: A POLYVINYLCHLORIDE MATRIX HAVING UNIFORMLY DISPERSED THEREIN: A. 30 TO 60 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYVINYLCHLORIDE AND ONE OR MORE INORGANIC POWDERED MATERIALS STABLE AT 300*C, HAVING A PARTICLE SIZE OF 5 TO 50 MICRONS AND B. 0.1 TO 3.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYVINYLCHLORIDE OF A HYDROPHYLIC SURFACTANT; SAID FIBER HAVING A THICKNESS OF 50 TO 300 DENIER AND A LENGTH OF 5 TO 100 MM, THE PARTICLES OF SAID INORGANIC POWDERED MATERIAL PROTRUDING THROUGH THE SURFACE OF SAID FIBER.
Claim 2
Dependent Claim
104 words
AN ORGANIC CEMENT REINFORCING ADDITIVE IN FIBER FORM CONSISTING ESSENTIALLY OF: A POLYVINYLCHLORIDE MATRIX HAVING UNIFORMLY DISPERSED THEREIN: A. 30 TO 60 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYVINYLCHLORIDE AND ONE OR MORE INORGANIC POWDERED MATERIALS STABLE AT 300*C, HAVING A PARTICLE SIZE OF 5 TO 50 MICRONS AND B. 0.1 TO 3.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYVINYLCHLORIDE OF A HYDROPHYLIC SURFACTANT; SAID FIBER HAVING A THICKNESS OF 50 TO 300 DENIER AND A LENGTH OF 5 TO 100 MM, THE PARTICLES OF SAID INORGANIC POWDERED MATERIAL PROTRUDING THROUGH THE SURFACE OF SAID FIBER.
Claim 3
Dependent Claim
34 words
An inorganic cement reinforcing fiber according to claim 1 wherein the inorganic powdered material is selected from the group consisting of water-hardenable lime, water hardenable magnesia lime, alumina cement, portland cement and white cement.
Claim 4
Dependent Claim
17 words
An inorganic cement reinforcing fiber according to claim 2 wherein the cement is portland or white cement.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |