US3736175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum coating method
Assignee: EIDP Inc
•
Filing: 1972-06-02
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Granted: 1973-05-29
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Expires: 1992-06-02
Abstract
Abstract IN VACUUM METALLIZING, CREEP WITHIN A CRUDIBLE IS INHIBITED BY HEATING THE BODY PORTION OF THE CRUCIBLE TO A TEMPERATURE ABOVE THE VAPORIZATION TEMPERATURE OF THE METAL COATING STUFF WHILE HEATING A VERTICALLY EXTENDING LIP PORTION OF THE CRUCIBLE TO A TEMPERATURE WH IS BELOW SAID VAPORIZATION TEMPERATURE BUT ABOVE THE MELTING POINT TEMPERATURE OF SAID METAL COATING STUFF.
Inventors
- 👤 J Carleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:30
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/26
Claims Analysis
Total Claims: 0
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |