US3713882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting carbonaceous material from oxidation at high temperature
Assignee: BRUNNER R DE
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Filing: 1971-03-05
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Granted: 1973-01-30
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Expires: 1991-03-05
Abstract
Abstract Oxidation resistance is imparted to all-carbon bodies by applying a phosphoric acid solution of manganese pyrophosphate thereto and heating the coated body to a temperature of 500* C or greater for approximately 5-10 minutes.
Inventors
- 👤 Brunner R De
- 👤 P Clements
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:41
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B05; B05D; B05D7/00; B05D7/14; C04B41/45; C04B41/50; C04B41/5076; C04B41/5092; C04B41/80; C04B41/81; C04B41/85; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/16; F16D; F16D69/00; F16D69/02; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
An all-carbon oxidation resistant body having a coating formed by applying a phosphoric acid solution of manganese pyrophosphate in the weight ratios of 25-30% H2O/45-55% H3PO4/20-25% Mn2P2O7 . 7H2O and heating the coated body to a temperature of at least 500* C for approximately 5-10 minutes.
Claim 2
Dependent Claim
46 words
An all-carbon oxidation resistant body having a coating formed by applying a phosphoric acid solution of manganese pyrophosphate in the weight ratios of 25-30% H2O/45-55% H3PO4/20-25% Mn2P2O7 . 7H2O and heating the coated body to a temperature of at least 500* C for approximately 5-10 minutes.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |