US2244550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforating method and apparatus
Assignee: Individual
•
Filing: 1940-03-11
•
Granted: 1941-06-03
•
Expires: 1960-03-11
Abstract
No abstract record available.
Inventors
- 👤 Chandler Frank Jermain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:29
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/26; B26F1/24; Y; Y10; Y10S; Y10S425/00; Y10S425/037; Y10T; Y10T156/00; Y10T156/12; Y10T156/1304; Y10T156/1313; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0414; Y10T83/283; Y10T83/566; Y10T83/5669; Y10T83/576; Y10T83/5769
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) | 1944-06-02 | 1944-12-02 | 1945-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-02 | 1948-12-02 | 1949-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-02 | 1952-12-02 | 1953-06-03 | $7700.00 | Window Closed / Lapsed |