Patent US2184922A successfully refreshed from Google Patents.
US2184922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing sectional coatings in vacuum vessels
Assignee: FIRM OF FERNSEH AG
•
Filing: 1937-02-11
•
Granted: 1939-12-26
•
Expires: 1957-02-11
Abstract
No abstract record available.
Inventors
- 👤 Gunzel Erwin
- 👤 Ruska Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:15
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/88; C; C23; C23C; C23C14/00; C23C14/04; C23C14/046; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-12-25 | 1943-06-26 | 1943-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-25 | 1947-06-26 | 1947-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-25 | 1951-06-26 | 1951-12-26 | $7700.00 | Window Closed / Lapsed |