US3776762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry lubrication
Assignee: DU KOTE CORP US
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Filing: 1971-10-18
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Granted: 1973-12-04
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Expires: 1991-10-18
Abstract
Abstract Applying a dry, lubricous, protective coating of polymerous material on the surfaces of parts in a thickness of about 100 A. and in added increments thereof by cleaning the surfaces of the parts by subjecting the parts to ionic glow discharge in a low vacuum atmosphere and then coating the cleaned surfaces of the parts with polymerous material by subjecting the parts to ionic bombardment in an ionized atmosphere of fluorcarbon gas at about 6 X 10 6 Torr.
Inventors
- 👤 J Bernath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:54
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; B05D3/00; B05D3/14; B05D3/141; B05D3/142; B05D3/144; B08; B08B; B08B7/00; B08B7/0035
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
The method set forth in claim 1 which includes establishing a glow discharge in the chamber between the article and cathode before introducing the gas to clean the surface of the article.
Claim 2
Dependent Claim
27 words
The method set forth in claim 1 wherein the atmosphere in the chamber is established at 6 X 10 6 Torr prior to introduction of the gas.
Claim 3
Dependent Claim
53 words
The method set forth in claim 1 which includes establishing a glow discharge in the chamber between the article and cathode before introducing the gas to clean the surface of the article and wherein the atmosphere in the chamber is established at 6 X 10 6 Torr prior to introduction of the gas.
Claim 4
Independent Claim
115 words
The method of depositing an electrically non-insulating, dry, lubricating, protective film of fluor-carbon polymer having a thickness not more than 200 A. in thickness onto a surface of a nonconductive article, which comprises placing the article on an anode support connected with a power supply and within a vacuum chamber and with the surfaces of the article to be coated exposed, introducing an amount of fluorcarbon gas substantially equal to the amount of polymer in the finished coating and which coats the anode, establishing a glow discharge in the chamber between the anode and a cathode and exhaustively depositing the fluorocarbon gas onto the surface of the article and the anode thereby extinguishing the glow.
Claim 5
Dependent Claim
32 words
The method set forth in claim 5 which includes establishing a glow discharge in the chamber between the article and cathode before introducing the gas to clean the surface of the article.
Claim 6
Dependent Claim
27 words
The method set forth in claim 5 wherein the atmosphere in the chamber is established at 6 X 10 6 Torr prior to introduction of the gas.
Claim 7
Dependent Claim
53 words
The method set forth in claim 5 which includes establishing a glow discharge in the chamber between the article and cathode before introducing the gas to clean the surface of the article and wherein the atmosphere in the chamber is established at 6 X 10 6 Torr prior to introduction of the gas.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |