US2227177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sintering metal
Assignee: Individual
•
Filing: 1939-04-22
•
Granted: 1940-12-31
•
Expires: 1959-04-22
Abstract
No abstract record available.
Inventors
- 👤 Berghaus Bernhard
- 👤 Burkhardt Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/32009; H01J37/32018; B; B22; B22F; B22F3/00; B22F3/10; B22F3/105; C; C21; C21D; C21D1/00; C21D1/74; F; F27; F27B; F27B17/00
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) | 1943-12-31 | 1944-07-01 | 1944-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-31 | 1948-07-01 | 1948-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-31 | 1952-07-01 | 1952-12-31 | $7700.00 | Window Closed / Lapsed |