US2255739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: Potter & Johnston Machine Co
•
Filing: 1938-06-08
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Granted: 1941-09-09
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Expires: 1958-06-08
Abstract
No abstract record available.
Inventors
- 👤 Myron S Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:38
CPC Classifications
B; B23; B23Q; B23Q37/00; Y; Y10; Y10S; Y10S29/00; Y10S29/051; Y10S29/055; Y10S82/00; Y10S82/901; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5159; Y10T29/5161; Y10T408/00; Y10T408/31; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18072; Y10T74/1808; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437; Y10T82/00; Y10T82/25
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) | 1944-09-08 | 1945-03-10 | 1945-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-08 | 1949-03-10 | 1949-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-08 | 1953-03-10 | 1953-09-09 | $7700.00 | Window Closed / Lapsed |