US2005137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary machine
Assignee: Nat Superior Co
•
Filing: 1930-12-26
•
Granted: 1935-06-18
•
Expires: 1950-12-26
Abstract
No abstract record available.
Inventors
- 👤 David S Faulkner
- 👤 Rice Allen Erwin
- 👤 Lewis E Zerbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:36
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19293; Y10T74/19298; Y10T74/19307; Y10T74/19312; Y10T74/19637; Y10T74/19642; Y10T74/1966; Y10T74/19665
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) | 1938-06-17 | 1938-12-17 | 1939-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-17 | 1942-12-17 | 1943-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-17 | 1946-12-17 | 1947-06-18 | $7700.00 | Window Closed / Lapsed |