Patent US2865791A successfully refreshed from Google Patents.
US2865791A
Expired / Lapsed
US
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Metal nitride coating process
Assignee: GEA Group AG
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Filing: 1955-02-28
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Granted: 1958-12-23
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Ruppert Wilhelm
- 👤 Schwedler Gottfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:10
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A PROCESS FOR COATING SURFACES WITH TITANIUM NITRIDE WHICH COMPRISES INTRODUCING SEPARATELY A TITANIUM HALIDE AND AMMONIA IN A NITRIDING ZONE ADJACENT TO THE SURFACES TO BE COATED MAINTAINED AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE COMPLEX COMPOUNDS OF AMMONIA WITH THE TITANIUM HALIDE, SAID AMMONIA AND SAID TITANIUM HALIDE BEING BROUGHT INTO CONTACT WITH EACH OTHER ONLY AT A TEMPERATURE ABOVE SAID DECOMPOSITION TEMPERATURE, SAID TITANIUM HALIDE BEING FORMED BY PASSING A HYDROGEN HALIDE OVER TITANIUM NITRIDE.
References Cited (Backward Citations)
US448915A
Cited
US1794810A
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US1761936A
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US1902676A
Cited
US2191331A
Cited
GB621890A
Cited
GB722797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |