US2339839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: Potter & Johnston Machine Co
•
Filing: 1941-08-26
•
Granted: 1944-01-25
•
Expires: 1961-08-26
Abstract
No abstract record available.
Inventors
- 👤 Myron S Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:03
CPC Classifications
B; B23; B23Q; B23Q15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5159; Y10T29/5161; Y10T29/5179
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) | 1947-01-24 | 1947-07-26 | 1948-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-24 | 1951-07-26 | 1952-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-24 | 1955-07-26 | 1956-01-25 | $7700.00 | Window Closed / Lapsed |