US3133829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying protective coatings to metals
Assignee: EIDP Inc
•
Filing: 1959-02-02
•
Granted: 1964-05-19
•
Expires: 1979-02-02
Abstract
No abstract record available.
Inventors
- 👤 Martin E Cupery
- 👤 Raymond P Jackson
- 👤 Walter H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:22
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/04; C23C24/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A PROCESS FOR MINIMIZING UNDERSIRABLE CHANGES IN THE SURFACE REGIONS OF METALS AT ELEVATED TEMPERATURES THE STEPS COMPRISING COATING THE METAL TO BE PROTECTED WITH A FILM OF COLLOIDAL SILICA SOL IN WHICH THE ULTIMATE SILICA PARTICLES HAVE AN AVERAGE SIZE OF ABOUT 3 TO 150 MILLIMICRONS AND THE ALKALINITY IS NOT MORE THAN ENOUGH TO MAKE THE SIO2:ALKALI OXIDE WEIGHT RATIO AT LEAST 60:1 DRYING THE SOL, AND HEATING THE METAL CONTAINING THE DRIED COATING TO AT LEAST 500*F.
Claim 2
Dependent Claim
81 words
IN A PROCESS FOR MINIMIZING UNDERSIRABLE CHANGES IN THE SURFACE REGIONS OF METALS AT ELEVATED TEMPERATURES THE STEPS COMPRISING COATING THE METAL TO BE PROTECTED WITH A FILM OF COLLOIDAL SILICA SOL IN WHICH THE ULTIMATE SILICA PARTICLES HAVE AN AVERAGE SIZE OF ABOUT 3 TO 150 MILLIMICRONS AND THE ALKALINITY IS NOT MORE THAN ENOUGH TO MAKE THE SIO2:ALKALI OXIDE WEIGHT RATIO AT LEAST 60:1 DRYING THE SOL, AND HEATING THE METAL CONTAINING THE DRIED COATING TO AT LEAST 500*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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |