US2464351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of successively cutting and differentially hardening a toothed member
Assignee: Linde Air Products Co
•
Filing: 1944-04-19
•
Granted: 1949-03-15
•
Expires: 1964-04-19
Abstract
No abstract record available.
Inventors
- 👤 Shorter Albert Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/32; B; B23; B23F; B23F17/00; B23K; B23K7/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-14 | 1952-09-13 | 1953-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-14 | 1956-09-13 | 1957-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-14 | 1960-09-13 | 1961-03-15 | $7700.00 | Window Closed / Lapsed |