Patent US4354888A successfully refreshed from Google Patents.
US3617366A
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Metal ware having waterproof surface and process for making
Assignee: Cabot Corp
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Filing: 1969-02-07
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Granted: 1971-11-02
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Expires: 1989-02-07
Abstract
Abstract A method is disclosed for waterproofing metallic surfaces by applying thereto the hydrophobic reaction product of a particulate metal oxide or metalloid oxide and an organosilicon compound.
Inventors
- 👤 Paul R Tully
- 👤 William J Fletcher
- 👤 Hector Cochrane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:48
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5076; C04B41/5089; C08; C08J; C08J7/00; C08J7/04; C08J7/06; C09; C09D; C09D5/00; C09D5/02; C09D5/024; C09D7/00; C09D7/40; C09D7/60; C09D7/61; D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/62; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24917; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
The metal ware of claim 1 wherein said metal comprises iron and is subject to water induced rusting.
Claim 2
Dependent Claim
25 words
The metal ware of claim 1 wherein said metal oxide or metalloid oxide has an average ultimate particle diameter of less than about 0.1 micron.
Claim 3
Dependent Claim
15 words
The metal ware of claim 1 wherein said metalloid oxide is pyrogenic or precipitated silica.
Claim 4
Dependent Claim
27 words
The metal ware of claim 1 wherein the concentration of said organosilicon surface structures represents at least about 4 percent by weight of the surface modified oxide.
Claim 5
Dependent Claim
19 words
The metal ware of claim 1 wherein, in the formula epsilon O-SiRaXb a is 3 and b is 0.
Claim 6
Dependent Claim
22 words
The metal ware of claim 1 wherein said metal oxide or metalloid oxide has a percent porosity of less than about 10.
Claim 7
Dependent Claim
22 words
The metal ware of claim 1 wherein said metal oxide or metalloid oxide is rendered hydrophobic by reaction thereof with an organodisilazane.
Claim 8
Dependent Claim
171 words
A process for rendering the surface of metals waterproof which comprises: a. providing a dispersion consisting essentially of: i. the hydrophobic reaction product of a particulate metal oxide or metalloid oxide having an average ultimate particle diameter of less than about 0.5 micron and at least about 0.5 percent by weight thereof of an organosilicon compound, said reaction product having surface structures conforming to the formula; epsilon O-SiRaXb wherein epsilon represents the metal oxide or metalloid oxide surface, O is an oxygen atom of said metal oxide or metalloid oxide surface, Si is a silicon atom, each R is any alkyl, arylalkyl, alkoxy or aryloxy group, a is a number from 1 through 3, X is any halogen or hydroxyl group, b is a number from 0 through 2, a+b 3, and wherein said silicon atom is bonded directly to said oxygen atom and ii. an inert organic volatile solvenT; b. applying said dispersion to the metal surface; and c. removing the solvent portion of said dispersion from the metal surface.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |