US4367094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slump reduction-preventing agent and method for improving applicability of mortar concrete
Assignee: Sanyo Kokusaku Pulp Co Ltd
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Filing: 1979-09-12
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Granted: 1983-01-04
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Expires: 1999-09-12
Abstract
Abstract PCT No. PCT/JP79/00243 Sec. 371 Date Jun. 16, 1980 Sec. 102(e) Date Jun. 16, 1980 PCT Filed Sep. 12, 1979 PCT Pub. No. WO80/00835 PCT Pub. Date May 1, 1980.An agent for preventing deterioration in the slump properties of mortar concrete, containing as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit. Disclosed is also a method for improving the workability of mortar concrete, comprising adding said agent to the mortar concrete in an amount of 0.05 to 0.5% in relation to cement and at any suitable point of time before or after mixing.
Inventors
- 👤 Yukio Fujimaru
- 👤 Toshihiro Sugiwaki
- 👤 Keiji Ueoka
- 👤 Shigenobu Fujioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:35
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B24/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A method for improving the workability of mortar concrete, which comprises adding thereto an agent for preventing deterioration in the slump properties thereof which agent contains as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit, in an amount of 0.05 to 0.5% in relation to cement and at the starting point of mixing, in the course of mixing or at any point of time between mixing and placing, followed by mixing or re-mixing.
Claim 2
Independent Claim
95 words
A method for improving the workability of mortar concrete, which comprises adding thereto an agent for preventing deterioration in the slump properties thereof which agent contains as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit, in an amount of 0.05 to 0.5% in relation to cement and at the starting point of mixing, in the course of mixing or at any point of time between mixing and placing, followed by mixing or re-mixing.
Claim 3
Independent Claim
103 words
A method for improving the workability of mortar concrete using a cement dispersant, which comprises adding thereto, apart from said dispersant, an agent for preventing deterioration in the slump properties thereof which agent contains as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit, in an amount of 0.05 to 0.5% in relation to cement and at the starting point of mixing, in the course of mixing or at any point of time between mixing and placing, followed by mixing or re-mixing.
Claim 4
Independent Claim
103 words
A method for improving the workability of mortar concrete using a cement dispersant, which comprises adding thereto, apart from said dispersant, an agent for preventing deterioration in the slump properties thereof which agent contains as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit, in an amount of 0.05 to 0.5% in relation to cement and at the starting point of mixing, in the course of mixing or at any point of time between mixing and placing, followed by mixing or re-mixing.
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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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |