US2683667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating coating
Assignee: United States Department of the Army
•
Filing: 1952-04-28
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Granted: 1954-07-13
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Expires: 1972-04-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Utter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/34; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A COMPOSITION FOR USE AS A HEAT INSULATING COATING FOR A ROCKET COMBUSTION CHAMBER WHICH COMPRISES A MIXTURE OF ABOUT 15% COMMINUTED MAGNESIUM OXIDE AND 85% COMMINUTED SILICON DIOXIDE IN A SOLUTION COMPRISING NOT MORE THAN 50 PERCENT OF ETHYL SILICATE AND THE REMAINDER METHYL ALCOHOL TOGETHER WITH 10 TO 25 PERCENT BY WEIGHT OF PHOSPHORIC ANHYDRIDE.
Claim 2
Dependent Claim
57 words
A COMPOSITION FOR USE AS A HEAT INSULATING COATING FOR A ROCKET COMBUSTION CHAMBER WHICH COMPRISES A MIXTURE OF ABOUT 15% COMMINUTED MAGNESIUM OXIDE AND 85% COMMINUTED SILICON DIOXIDE IN A SOLUTION COMPRISING NOT MORE THAN 50 PERCENT OF ETHYL SILICATE AND THE REMAINDER METHYL ALCOHOL TOGETHER WITH 10 TO 25 PERCENT BY WEIGHT OF PHOSPHORIC ANHYDRIDE.
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |