US2193768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic alloys
Assignee: KINZOKU ZAIRYO KENKYUSHO
•
Filing: 1937-09-14
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Granted: 1940-03-12
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Expires: 1957-09-14
Abstract
No abstract record available.
Inventors
- 👤 Masumoto Hakaru
- 👤 Yamamoto Tatsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:35
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/06; C22C38/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
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) | 1943-03-12 | 1943-09-11 | 1944-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-12 | 1947-09-11 | 1948-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-12 | 1951-09-11 | 1952-03-12 | $7700.00 | Window Closed / Lapsed |