Patent US4467817A successfully refreshed from Google Patents.
US4074011A
Expired / Lapsed
US
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Topcoated phosphated bolts, nuts and washers
Assignee: Nippon Steel Corp
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Filing: 1976-08-27
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Granted: 1978-02-14
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Expires: 1996-08-27
Abstract
Abstract A bolt, nut and washer is first coated with an under-coating consisting of metal phosphate, and is then coated with a second or top coating consisting of a chromium compound and one or more of a metal salt of higher fatty acid, polyolefin and polyethylene tetrafluoride dissolved or dispersed in a vehicle. The composite coating improves the corrosion resisting and lubricating properties of bolts, nuts and washers coated therewith, and also serves as an excellent base for paints.
Inventors
- 👤 Akira Teramae
- 👤 Koji Yamada
- 👤 Hironobu Kawasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:05
CPC Classifications
F; F16; F16B; F16B33/00; F16B33/008; C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; F16B33/06; Y; Y10; Y10S; Y10S411/00; Y10S411/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31692; Y10T428/8305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A bolt, nut and washer having an adherent, corrosion resistant, lubricious and paintable coating applied on the surface thereof, said coating being composed of an under-coating layer of phosphate of metals having a weight of 0.1 to 50 g/m 2 , and a top-coating layer of a weight of 0.1 to 50 g/m 2 and containing a paintable base-forming vehicle, a chromium compound present in an amount of 0.5 to 25% by weight of chromium based on the dried weight of the top coating, and a lubricity-imparting ingredient of one or more materials selected from the group consisting of metal salts of higher fatty acid in an amount from 1 to 20%, polyolefin compounds in an amount from 1 to 50%, and polyethylene tetrafluoride in an amount from 1 to 50%, these percents being % by weight based on the dried weight of the top coating.
Claim 2
Dependent Claim
146 words
A bolt, nut and washer having an adherent, corrosion resistant, lubricious and paintable coating applied on the surface thereof, said coating being composed of an under-coating layer of phosphate of metals having a weight of 0.1 to 50 g/m 2 , and a top-coating layer of a weight of 0.1 to 50 g/m 2 and containing a paintable base-forming vehicle, a chromium compound present in an amount of 0.5 to 25% by weight of chromium based on the dried weight of the top coating, and a lubricity-imparting ingredient of one or more materials selected from the group consisting of metal salts of higher fatty acid in an amount from 1 to 20%, polyolefin compounds in an amount from 1 to 50%, and polyethylene tetrafluoride in an amount from 1 to 50%, these percents being % by weight based on the dried weight of the top coating.
References Cited (Backward Citations)
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GB1119536A
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US3960610A
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US3565699A
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US3819425A
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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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |