US1678359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating metal articles
Assignee: Allegheny Ludlum Corp
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Filing: 1926-04-20
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Granted: 1928-07-24
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Expires: 1946-04-20
Abstract
No abstract record available.
Inventors
- 👤 Schulte Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/085
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) | 1931-07-24 | 1932-01-23 | 1932-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-24 | 1936-01-23 | 1936-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-24 | 1940-01-23 | 1940-07-24 | $7700.00 | Window Closed / Lapsed |