US2418338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for treating tools
Assignee: AT&T Inc
•
Filing: 1944-06-17
•
Granted: 1947-04-01
•
Expires: 1964-06-17
Abstract
No abstract record available.
Inventors
- 👤 Dworkowski John
- 👤 James E Quigley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:53
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/02; B21K5/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE315315C
Cited
US874448A
Cited
US632862A
Cited
US737833A
Cited
US840578A
Cited
US1475939A
Cited
US1858733A
Cited
US1788463A
Cited
US1814516A
Cited
GB368287A
Cited
US2112645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-31 | 1950-09-30 | 1951-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-31 | 1954-09-30 | 1955-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-31 | 1958-09-30 | 1959-04-01 | $7700.00 | Window Closed / Lapsed |