US5275752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and product for inhibiting corrosion due to chlorides
Assignee: Individual
•
Filing: 1992-05-18
•
Granted: 1994-01-04
•
Expires: 2012-05-18
Abstract
Abstract The corrosive effect of salt on reinforced concrete in roadways, overpasses, bridges and buildings is inhibited by the application of a composition which consists essentially of ammonium carbamate, or which consists essentially of ammonium carbamate combined with salt or calcium chloride, as a deicer.
Inventors
- 👤 Charles N. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
37 words
A method of deicing metal reinforced structure, comprising applying to the structure a composition consisting essentially of ammonium carbamate and sodium chloride in which the ammonium carbamate is approximately 50% or more of the composition by weight.
Claim 2
Independent Claim
37 words
A method of deicing metal reinforced structure, comprising applying to the structure a composition consisting essentially of ammonium carbamate and sodium chloride in which the ammonium carbamate is approximately 50% or more of the composition by weight.
Claim 3
Dependent Claim
13 words
The method of claim 1, in which the composition is in granular form.
Claim 4
Independent Claim
37 words
A method of deicing metal reinforced structure, comprising applying to the structure a water solution of ammonium carbamate and sodium chloride in which the ammonium carbamate and sodium chloride comprise approximately 50% of the composition by weight.
Claim 5
Independent Claim
37 words
A method of deicing metal reinforced structure, comprising applying to the structure a water solution of ammonium carbamate and sodium chloride in which the ammonium carbamate and sodium chloride comprise approximately 50% of the composition by weight.
Claim 6
Independent Claim
17 words
A method of inhibiting corrosion of metal comprising applying a composition thereto consisting essentially of ammonium carbamate.
Claim 7
Independent Claim
17 words
A method of inhibiting corrosion of metal comprising applying a composition thereto consisting essentially of ammonium carbamate.
Claim 8
Dependent Claim
14 words
The method of claim 4, in which the ammonium carbamate is in granular form.
Claim 9
Dependent Claim
15 words
The method of claim 4, in which the ammonium carbamate is in a water solution.
Claim 10
Dependent Claim
22 words
A deicer corrosion inhibitor consisting essentially of ammonium carbamate and sodium chloride in which the ammonium carbamate is approximately 50% by weight.
Claim 11
Dependent Claim
22 words
A deicer corrosion inhibitor consisting essentially of ammonium carbamate and sodium chloride in which the ammonium carbamate is approximately 50% by weight.
Claim 12
Dependent Claim
20 words
A deicer corrosion inhibitor of claim 7, in which the ammonium carbamate and sodium chloride are in a water solution.
Claim 13
Independent Claim
36 words
A method of deicing metal or reinforced structure comprising applying thereto a composition consisting essentially of ammonium carbamate and calcium chloride in which the ammonium carbamate is approximately 3 times the weight of the calcium chloride.
Claim 14
Independent Claim
36 words
A method of deicing metal or reinforced structure comprising applying thereto a composition consisting essentially of ammonium carbamate and calcium chloride in which the ammonium carbamate is approximately 3 times the weight of the calcium chloride.
Claim 15
Dependent Claim
21 words
The method of deicing metal or reinforced structure as in claim 9, in which the composition is in a water solution.
Claim 16
Independent Claim
25 words
A method of inhibiting the corrosive tendency of sodium chloride on metal by combining said sodium chloride with approximately an equal weight of ammonium carbamate.
Claim 17
Independent Claim
25 words
A method of inhibiting the corrosive tendency of sodium chloride on metal by combining said sodium chloride with approximately an equal weight of ammonium carbamate.
Claim 18
Independent Claim
25 words
A method of inhibiting the corrosive tendency of calcium chloride on metal by combining said calcium chloride with approximately an equal weight of ammonium carbamate.
Claim 19
Independent Claim
25 words
A method of inhibiting the corrosive tendency of calcium chloride on metal by combining said calcium chloride with approximately an equal weight of ammonium carbamate.
Claim 20
Independent Claim
35 words
A method of inhibiting corrosion of metal comprising applying a composition to said metal consisting essentially of ammonium carbamate and a chloride selected from a group of chlorides consisting of sodium chloride and calcium chloride.
Claim 21
Independent Claim
35 words
A method of inhibiting corrosion of metal comprising applying a composition to said metal consisting essentially of ammonium carbamate and a chloride selected from a group of chlorides consisting of sodium chloride and calcium chloride.
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) | 1997-01-03 | 1997-07-05 | 1998-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-03 | 2005-07-05 | 2006-01-04 | $7700.00 | Window Closed / Lapsed |