US2884894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing hard coatings on workpieces
Assignee: GEA Group AG
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Filing: 1957-10-29
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Granted: 1959-05-05
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Expires: 1977-10-29
Abstract
No abstract record available.
Inventors
- 👤 Ruppert Wilhelm
- 👤 Schwedler Gottfried
- 👤 Essewein Otto
- 👤 Fritz Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32; C23C16/44
Claims Analysis
Total Claims: 0
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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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |