US4092109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for corrosion inhibition of reinforced bridge structures
Assignee: WR Grace and Co Conn
•
Filing: 1976-06-28
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Granted: 1978-05-30
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Expires: 1996-06-28
Abstract
Abstract A method of use of calcium nitrite in corrosion control in hydraulic cements that contain metal pieces or structures, and in certain related uses, e.g., snow removal from alite cement bridge decking.
Inventors
- 👤 Arnold Morry Rosenberg
- 👤 James Michael Gaidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B14/00; C04B14/02; C04B14/04; C04B14/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The method of protecting metal structures in hydraulic cement bridge decking against corrosion comprising applying an agent consisting calcium nitrite to the bridge decking.
Claim 2
Independent Claim
24 words
The method of protecting metal structures in hydraulic cement bridge decking against corrosion comprising applying an agent consisting calcium nitrite to the bridge decking.
Claim 3
Independent Claim
32 words
The method of protecting metal structures in hydraulic cement bridge decking against corrosion comprising applying an agent consisting of calcium nitrite to the juncture of the metal structure with the bridge decking.
Claim 4
Independent Claim
32 words
The method of protecting metal structures in hydraulic cement bridge decking against corrosion comprising applying an agent consisting of calcium nitrite to the juncture of the metal structure with the bridge decking.
References Cited (Backward Citations)
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US3227654A
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US3297577A
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US3210207A
Cited
US3384590A
Cited
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Cited
US3801338A
Cited
US3980487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |