US1545305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-treating apparatus and process
Assignee: Individual
•
Filing: 1924-04-21
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Granted: 1925-07-07
•
Expires: 1944-04-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Crapo
- 👤 Baylis William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:20
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/58; C21D1/00; C21D1/34; C21D1/44; C23; C23C; C23C2/00; C23C2/003; C23C2/0038; C23C2/02; C23C2/022; C23C2/024
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) | 1928-07-06 | 1929-01-05 | 1929-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-07-06 | 1933-01-05 | 1933-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-07-06 | 1937-01-05 | 1937-07-07 | $7700.00 | Window Closed / Lapsed |