Patent US2825664A successfully refreshed from Google Patents.
US2825664A
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Polytetrafluoroethylene coating compositions containing an alkali metal silicate and colloidal silica and articles coated therewith
Assignee: EIDP Inc
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Filing: 1954-01-21
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Granted: 1958-03-04
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Expires: 1974-01-21
Abstract
No abstract record available.
Inventors
- 👤 Huntsberger James Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C04B2111/00; C04B2111/00474; C04B2111/00482; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/258; Y10T428/259; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
AN AQUEOUS COATING COMPOSITION COMPRISING WATER, COLLODIAL POLYETRAFLUOROETHYLENE AND 10%-85% BY WEIGHT BASE ON THE POLYTETRAFLUOROETHYLENE OF WATERSOLUBLE ALKALI METAL SILICATE TOGETHER WITH COLLOCIAL SILICA, THE RATIO OF SAID SILICATE TO SAID SILICA BEING BETWEEN 25:75 AND 90:10 BY WEIGHT.
Claim 2
Dependent Claim
40 words
AN AQUEOUS COATING COMPOSITION COMPRISING WATER, COLLODIAL POLYETRAFLUOROETHYLENE AND 10%-85% BY WEIGHT BASE ON THE POLYTETRAFLUOROETHYLENE OF WATERSOLUBLE ALKALI METAL SILICATE TOGETHER WITH COLLOCIAL SILICA, THE RATIO OF SAID SILICATE TO SAID SILICA BEING BETWEEN 25:75 AND 90:10 BY WEIGHT.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |