Patent US3793055A successfully refreshed from Google Patents.
US3793055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming protective inorganic coating on substrate
Assignee: Panasonic Electric Works Co Ltd
•
Filing: 1971-06-17
•
Granted: 1974-02-19
•
Expires: 1991-06-17
Abstract
Abstract A method of forming an inorganic coating on a substrate is provided. The method includes applying on the surface of the substrate an aqueous inorganic coating composition comprising an alkali metal silicate and an inorganic condensed phosphate, which comprises applying before or after the application of the inorganic coating composition an effective amount of an aqueous curing agent solution of at least one compound selected from the group consisting of halides, sulfates, nitrates and organic acid salts of metals belonging to Groups II and III of Periodic Table and transition metals and ammonium halides, ammonium sulfate, ammonium persulfate, ammonium nitrate and inorganic acid salts of ammonium.
Inventors
- 👤 M Shodai
- 👤 H Tomokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:00
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0081; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C09D; C09D1/00; C09D1/02; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2004/88; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
31 words
A method as claimed in claim 1 wherein the aqueous curing agent solution is first applied on the substrate surface, drying the same and then applying the inorganic coating composition thereon.
Claim 2
Dependent Claim
31 words
A method as claimed in claim 1 wherein the inorganic coating composition is applied first on the substrate surface, drying the same and then applying the aqueous curing agent solution thereon.
Claim 3
Dependent Claim
10 words
A method of claim 1, wherein said substrate is slate.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |