US3776747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature resistant coating
Assignee: Rolls Royce PLC
•
Filing: 1972-02-10
•
Granted: 1973-12-04
•
Expires: 1992-02-10
Abstract
Abstract A composition for coating steel components, such as the compressor parts of gas turbine engines consisting essentially of from two parts to half a part by weight of potassium silicate; from one part to two parts by weight of finely divided aluminum powder, from one quarter to three quarters of a part by weight of a polyhydroxy alcohol and sufficient water to produce a viscosity of up to and including forty seconds when measured on a British Standard number 4 flow cup at 20* C.
Inventors
- 👤 N Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:39
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C09D5/103; C09D5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A composition as claimed in claim 1 and which is adapted to be applied as a spray consisting essentially of one part by weight of a 50 percent aqueous solution of potassium silicate, which potassium silicate has a mean weight ratio SiO2:K2O of between 1.43 and 2.05; one and one quarter parts by weight of finely divided granular aluminium powder; half a part by weight of glycerol and sufficient water to produce a viscosity of from 15 to 25 seconds when measured on a British Standard number 4 flow cup at 20*C.
Claim 2
Dependent Claim
72 words
A composition as claimed in claim 1 and which is adapted to be applied electrophoretically consisting essentially of one part by weight of a 50 percent aqueous solution of potassium silicate, which potassium silicate has a mean weight ratio SiO2:K2O of between 1.43 and 1.05; two parts by weight of finely divided grannular aluminium powder; half a part by weight of glycerol and one and a half parts BY weight of water.
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 |