US2167544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hard metal articles
Assignee: Metal Carbides Corp
•
Filing: 1937-09-09
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Granted: 1939-07-25
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Expires: 1957-09-09
Abstract
No abstract record available.
Inventors
- 👤 Bats Jean Hubert Louis De
- 👤 John A Ritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:54
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/02; B30B15/022; B21; B21B; B21B27/00; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B30B11/00; B30B11/02; B30B15/34; Y; Y10; Y10S; Y10S425/00; Y10S425/235; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/94; Y10S76/00; Y10S76/11; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49565; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/1209
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) | 1942-07-24 | 1943-01-23 | 1943-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-24 | 1947-01-23 | 1947-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-24 | 1951-01-23 | 1951-07-25 | $7700.00 | Window Closed / Lapsed |