US1969035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spur gear rotary machine
Assignee: Nat Superior Co
•
Filing: 1929-09-03
•
Granted: 1934-08-07
•
Expires: 1949-09-03
Abstract
No abstract record available.
Inventors
- 👤 Rice Allen Erwin
- 👤 Jr John Shelby Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19637; Y10T74/19642; Y10T74/19647; Y10T74/19651; 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) | 1937-08-06 | 1938-02-05 | 1938-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-06 | 1942-02-05 | 1942-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-06 | 1946-02-05 | 1946-08-07 | $7700.00 | Window Closed / Lapsed |