Patent US3029766A successfully refreshed from Google Patents.
US2689807A
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Method of coating refractory metal articles
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1950-06-16
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Granted: 1954-09-21
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Expires: 1970-06-16
Abstract
No abstract record available.
Inventors
- 👤 Robert A Kempe
- 👤 Robert R Ruppender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/06; C23C16/08; C23C16/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN THE METHOD OF COATING A REFRACTORY METAL ARTICLE INCLUDING THE STEP OF TREATING SAID ARTICLE WITH A COMBINED STREAM OF HYDROGEN AND A VAPORIZED DECOMPOSABLE HALIDE OF THE COATING METAL, THE IMPROVEMENT WHICH COMPRISES SURROUNDING THE ARTICLE TO BE COATED WITH A CLOSED CONTINUOUS POROUS WALL CONTAINER OF APPRECIABLE THICKNESS HAVING A UNIFORM POROSITY OF FROM 25% TO 85% AND BEING FREE FROM CHANNELS, EMBEDDING THE
Claim 2
Dependent Claim
67 words
IN THE METHOD OF COATING A REFRACTORY METAL ARTICLE INCLUDING THE STEP OF TREATING SAID ARTICLE WITH A COMBINED STREAM OF HYDROGEN AND A VAPORIZED DECOMPOSABLE HALIDE OF THE COATING METAL, THE IMPROVEMENT WHICH COMPRISES SURROUNDING THE ARTICLE TO BE COATED WITH A CLOSED CONTINUOUS POROUS WALL CONTAINER OF APPRECIABLE THICKNESS HAVING A UNIFORM POROSITY OF FROM 25% TO 85% AND BEING FREE FROM CHANNELS, EMBEDDING THE
References Cited (Backward Citations)
US1306568A
Cited
US1156496A
Cited
US1497417A
Cited
US1726431A
Cited
US1818909A
Cited
US1902503A
Cited
US1910968A
Cited
US2257668A
Cited
US2166919A
Cited
US2175922A
Cited
US2219004A
Cited
US2235504A
Cited
US2315294A
Cited
US2339136A
Cited
US2394002A
Cited
US2501051A
Cited
US2543708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |