US4609573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for inhibiting corrosion of steel materials built in inorganic materials
Assignee: Onoda Co Ltd
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Filing: 1985-03-12
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Granted: 1986-09-02
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Expires: 2005-03-12
Abstract
Abstract The present invention relates to a process for inhibiting corrosion of an existing steel material built in an inorganic material by applying an aqueous solution of an inorganic salt, an aqueous solution of a water-soluble silicate compound and a cement composition having corrosion-inhibiting effects on the surface of the inorganic material.
Inventors
- 👤 Kazuo Omata
- 👤 Toshihiko Shimizu
- 👤 Hiroshi Ibe
- 👤 Kenji Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:06
CPC Classifications
C; C23; C23F; C23F11/00; C04; C04B; C04B41/00; C04B41/60; C04B41/61; C04B41/70; C04B41/009; C04B41/45; C04B41/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A process for inhibiting corrosion of steel materials built in inorganic materials, which comprises subjecting the surface of an inorganic material having a steel material built therein to the following steps (A) and (B) in any order: step (A): applying an aqueous solution of calcium nitrite having a corrision-inhibiting effect on said steel material to the surface of the inorganic material to impregnate said material with the solution, and step (B): applying an aqueous solution of lithium silicate thereto to effect the impregnation, and subsequently, after subjecting the surface of the inorganic material to said steps (A) and (B), subjecting the inorganic material to step (C) as follows: step (C): topcoating the inorganic material with a cement composition containing a polymer dispersion.
Claim 2
Dependent Claim
122 words
A process for inhibiting corrosion of steel materials built in inorganic materials, which comprises subjecting the surface of an inorganic material having a steel material built therein to the following steps (A) and (B) in any order: step (A): applying an aqueous solution of calcium nitrite having a corrision-inhibiting effect on said steel material to the surface of the inorganic material to impregnate said material with the solution, and step (B): applying an aqueous solution of lithium silicate thereto to effect the impregnation, and subsequently, after subjecting the surface of the inorganic material to said steps (A) and (B), subjecting the inorganic material to step (C) as follows: step (C): topcoating the inorganic material with a cement composition containing a polymer dispersion.
Claim 3
Dependent Claim
129 words
A process for inhibiting corrosion of steel materials built in inorganic materials, which comprises subjecting the surface of an inorganic material having a steel material built therein to the following steps (A) and (B) in any order: step (A): applying an aqueous solution of calcium nitrite having a corrosion-inhibiting effect on said steel material to the surface of the inorganic material to impregnate said material with the solution, and step (B): applying an aqueous solution of lithium silicate thereto to effect the impregnation, and subsequently, after subjecting the surface of the inorganic material to said steps (A) and (B), subjecting the inorganic material to step (C) as follows: step (C): topcoating the inorganic material with a cement compositon containing a styrene/butadiene rubber dispersion obtained by an anionic polymerization (SBR-A).
Claim 4
Dependent Claim
129 words
A process for inhibiting corrosion of steel materials built in inorganic materials, which comprises subjecting the surface of an inorganic material having a steel material built therein to the following steps (A) and (B) in any order: step (A): applying an aqueous solution of calcium nitrite having a corrosion-inhibiting effect on said steel material to the surface of the inorganic material to impregnate said material with the solution, and step (B): applying an aqueous solution of lithium silicate thereto to effect the impregnation, and subsequently, after subjecting the surface of the inorganic material to said steps (A) and (B), subjecting the inorganic material to step (C) as follows: step (C): topcoating the inorganic material with a cement compositon containing a styrene/butadiene rubber dispersion obtained by an anionic polymerization (SBR-A).
Claim 5
Dependent Claim
83 words
A process for inhibiting corrosion of steel materials built in inorganic materials, which comprises subjecting the surface of an inorganic material having a steel material built therein to the following steps (A) and (B) in any order: step (A): applying an aqueous solution of calcium nitrite having a corrosion-inhibiting effect on said steel material to the surface of the inorganic material to impregnate said material with the solution, and step (B): applying an aqueous solution of lithium silicate thereto to effect the impregnation.
Claim 6
Dependent Claim
83 words
A process for inhibiting corrosion of steel materials built in inorganic materials, which comprises subjecting the surface of an inorganic material having a steel material built therein to the following steps (A) and (B) in any order: step (A): applying an aqueous solution of calcium nitrite having a corrosion-inhibiting effect on said steel material to the surface of the inorganic material to impregnate said material with the solution, and step (B): applying an aqueous solution of lithium silicate thereto to effect the impregnation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |