US3944712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc dust-coated steel ligatures
Assignee: Signode Corp
•
Filing: 1973-08-10
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Granted: 1976-03-16
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Expires: 1993-08-10
Abstract
Abstract Steel ligatures are provided having coated thereon a thin film of a resin composition containing zinc particles. The resin composition comprises a mixture of an epoxy resin and a phenolic resin, and the coating may be cured, or substantially uncured, as desired.
Inventors
- 👤 Joseph F. Kurcz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:06
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/04; C09D161/06; C09D163/00; C09D5/00; C09D5/08; C09D5/10; C09D5/106; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12104; Y10T428/12111; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31688; Y10T428/31942
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A steel ligature having adherently coated thereon a thin and flexible film comprising from about 80 to about 96 weight percent of finely divided zinc particles and 4 to 20 weight percent of a binder material, said binder material comprising from about 8 to about 65 weight percent of a phenol-formaldehyde resin and from about 35 to about 92 weight percent of a low molecular weight epoxy resin.
Claim 2
Dependent Claim
68 words
A steel ligature having adherently coated thereon a thin and flexible film comprising from about 80 to about 96 weight percent of finely divided zinc particles and 4 to 20 weight percent of a binder material, said binder material comprising from about 8 to about 65 weight percent of a phenol-formaldehyde resin and from about 35 to about 92 weight percent of a low molecular weight epoxy resin.
Claim 3
Dependent Claim
28 words
The ligature of claim 1 wherein said phenol-formaldehyde resin is a phenol-formaldehyde condensation product having an average molecular weight in the range between about 800 and about 2000.
Claim 4
Dependent Claim
32 words
The ligature of claim 1 wherein said epoxy resin is a condensation product of epichlorohydrin and bisphenol A having an average molecular weight in the range between about 1200 and about 5000.
Claim 5
Dependent Claim
18 words
The ligature of claim 1 wherein said coating has a thickness between about 0.3 and about 0.6 mils.
Claim 6
Dependent Claim
21 words
The ligature of claim 1 wherein said finely divided zinc particles have an average particle size no greater than 10 microns.
Claim 7
Dependent Claim
119 words
A steel strapping having adherently coated thereon a flexible film having a thickness between about 0.3 and 0.6 mils and comprising from about 83 to about 95 weight percent of finely divided zinc particles having an average particle size no greater than about 4 microns and about 5 to about 17 parts by weight of a binder material, said binder material comprising from about 30 to about 40 weight percent of a phenol-formaldehyde condensation product having an average molecular weight in the range of about 800 to about 2000 and about 60 to about 70 weight percent of a condensation product of epichlorohydrin and bisphenol A having average molecular weight in the range between about 1200 and about 5000.
Claim 8
Dependent Claim
119 words
A steel strapping having adherently coated thereon a flexible film having a thickness between about 0.3 and 0.6 mils and comprising from about 83 to about 95 weight percent of finely divided zinc particles having an average particle size no greater than about 4 microns and about 5 to about 17 parts by weight of a binder material, said binder material comprising from about 30 to about 40 weight percent of a phenol-formaldehyde condensation product having an average molecular weight in the range of about 800 to about 2000 and about 60 to about 70 weight percent of a condensation product of epichlorohydrin and bisphenol A having average molecular weight in the range between about 1200 and about 5000.
Claim 9
Independent Claim
119 words
A method of making a corrosion resistant steel ligature which comprises applying to a steel ligature a liquid composition containg from about 20 to about 40 weight percent of solvents and 80 to about 60 weight percent of solids, said solid comprising from about 80 to about 96 weight percent of finely divided zinc particles and from about 4 to about 20 weight percent by a binder material comprising from about 8 to about 65 weight percent of phenol-formaldehyde resin and from about 35 to about 92 weight percent of a low molecular weight of epoxy resin, and thereafter heating said coated ligature to at least drive off said solvent and leave a solid coherent coating on said ligature.
Claim 10
Independent Claim
119 words
A method of making a corrosion resistant steel ligature which comprises applying to a steel ligature a liquid composition containg from about 20 to about 40 weight percent of solvents and 80 to about 60 weight percent of solids, said solid comprising from about 80 to about 96 weight percent of finely divided zinc particles and from about 4 to about 20 weight percent by a binder material comprising from about 8 to about 65 weight percent of phenol-formaldehyde resin and from about 35 to about 92 weight percent of a low molecular weight of epoxy resin, and thereafter heating said coated ligature to at least drive off said solvent and leave a solid coherent coating on said ligature.
Claim 11
Dependent Claim
26 words
The method of claim 7 wherein said heating is at a temperature and for a time such that said binder material remains soluble in said solvent.
Claim 12
Dependent Claim
26 words
The method of claim 7 wherein said heating is at a temperature and for a time such that said binder material becomes insoluble in said solvent.
Claim 13
Dependent Claim
19 words
The method of claim 8 wherein said heating is at a temperature from about 300° to about 400° F.
Claim 14
Dependent Claim
16 words
The method of claim 9 wherein said heating is at a temperature of about 700° F.
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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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |