US3806571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of reinforced, steam-cured light-weight concrete and a composition for carrying out the method
Assignee: Internationella Siporex AB
•
Filing: 1968-07-05
•
Granted: 1974-04-23
•
Expires: 1988-07-05
Abstract
Abstract A method for the manufacture of metal reinforced, steam-cured, light weight concrete where the metal reinforcement is provided with a protective coating thereon prior to being embedded in the concrete. The protective coating comprises an aqueous mixture of 60 - 90 percent by weight of Portland Cement, 10 - 50 percent of water, and 2 - 20 percent by weight of a copolymer selected from the group consisting of copolymers of acrylic acid ethyl ester, methacrylic acid methyl ester, methacrylic butyl ester, and methacrylic acid isobutyl ester.
Inventors
- 👤 K Ronnmark
- 👤 B Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:12
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/01; E04C5/015; E04C5/017; C; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A method according to claim 1 characterized in that the mixture is an anionic suspension.
Claim 2
Dependent Claim
15 words
A method according to claim 1 characterized in that the mixture is a non-ionic suspension.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |