US5314758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot dip terne coated roofing material
Assignee: LOUIS BERKMAN COMPANY
•
Filing: 1992-03-27
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Granted: 1994-05-24
•
Expires: 2012-03-27
Abstract
Abstract Various metal coatings have been used for many years to inhibit oxidation of metals exposed to the natural elements of the atmosphere over a period of time. Terne alloy coatings which normally contain about 20% tin and about 80% lead are some of the most popular metal coating treatments to resist corrosion. The special formulation of the present invention reformulates the terne coating to constitute a tin and lead based coating where tin constitutes at least 90% of the terne and lead amounts to less than 0.1% and preferably less than 0.05% of the terne. The low lead terne coating may also include antimony and bismuth to provide strength and hardness to the low lead terne formulation having corrosion resistive qualities similar to that of standard terne coating formulations.
Inventors
- 👤 II Jay F. Carey
- 👤 Mehrooz Zamanzadeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:53
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/08; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12722; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
A coated metal roofing material formed of carbon steel or stainless steel sheet metal roofing materials coated with a terne coating forming a highly corrosive resistant coated roofing material, said terne coating having a low lead formulation and includes at least 0.05 weight percent stabilizing agent, said terne consisting of: ______________________________________
Tin 91-99.9%
Lead 0.001-0.1%
Bismuth 0.0-1.7%
Antimony 0.0-7.2%
Zinc 0.0-1.5%
Iron 0.0-0.1%
Copper 0.0-2.7%
______________________________________
Claim 2
Dependent Claim
66 words
A coated metal roofing material formed of carbon steel or stainless steel sheet metal roofing materials coated with a terne coating forming a highly corrosive resistant coated roofing material, said terne coating having a low lead formulation and includes at least 0.05 weight percent stabilizing agent, said terne consisting of: ______________________________________
Tin 91-99.9%
Lead 0.001-0.1%
Bismuth 0.0-1.7%
Antimony 0.0-7.2%
Zinc 0.0-1.5%
Iron 0.0-0.1%
Copper 0.0-2.7%
______________________________________
Claim 3
Dependent Claim
17 words
A coated metal roofing material as in claim 1, wherein said lead is about 0.01 weight percent.
Claim 4
Dependent Claim
18 words
A coated metal roofing material as in claim 1, wherein said steel metal roofing material is stainless steel.
Claim 5
Dependent Claim
23 words
A coated metal roofing material as in claim 1, wherein the thickness of said terne coating ranges between 0.0003 in. to 0.2 in.
Claim 6
Dependent Claim
21 words
A coated metal roofing material as in claim 4, wherein said terne coating thickness is between 0.001 in. to 0.002 in.
Claim 7
Dependent Claim
30 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Bismuth 1.7%
Antimony 0.5%
Zinc 0.001%
Lead 0.02%
Tin Remainder
______________________________________
Claim 8
Dependent Claim
32 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Bismuth 0.5%
Antimony 0.75%
Zinc 0.5%
Lead 0.05%
Iron 0.01%
Tin Remainder
______________________________________
Claim 9
Dependent Claim
26 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Antimony 7.2%
Copper 2.7%
Tin Remainder
______________________________________
Claim 10
Dependent Claim
28 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Antimony 2.5%
Copper 2.0%
Zinc 0.5%
Tin Remainder
______________________________________
Claim 11
Dependent Claim
28 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Bismuth 0.5%
Antimony 0.75%
Zinc 0.5%
Tin Remainder
______________________________________
Claim 12
Dependent Claim
28 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Bismuth 0.5%
Antimony 1.0%
Iron 0.1%
Tin Remainder
______________________________________
Claim 13
Dependent Claim
26 words
A coated metal roofing material as in claim 1, wherein said terne consisting of the following weight percentages: ______________________________________
Bismuth 0.5%
Iron 0.1%
Tin Remainder
______________________________________
Claim 14
Dependent Claim
23 words
A coated metal roofing material as in claim 1, wherein said stabilizing agent is selected from the group consisting of bismuth and antimony.
Claim 15
Dependent Claim
18 words
A coated metal roofing material as in claim 13, wherein said lead is less than 0.01 weight percent.
Claim 16
Dependent Claim
18 words
A coated metal roofing material as in claim 14, wherein said tin is greater than 95 weight percent.
Claim 17
Dependent Claim
58 words
A coated metal roofing material formed of carbon steel or stainless steel sheet metal roofing materials coated with a terne coating forming a highly corrosive resistant coated roofing materials, said terne having a low lead formulation comprising 0.001 to less than 0.10 weight percent lead, at least 95 weight percent tin and at least 0.05 weight percent stabilizer.
Claim 18
Dependent Claim
58 words
A coated metal roofing material formed of carbon steel or stainless steel sheet metal roofing materials coated with a terne coating forming a highly corrosive resistant coated roofing materials, said terne having a low lead formulation comprising 0.001 to less than 0.10 weight percent lead, at least 95 weight percent tin and at least 0.05 weight percent stabilizer.
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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) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |