US923724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rod connection.
Assignee: Allis Chalmers Corp
•
Filing: 1906-12-07
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Granted: 1909-06-01
•
Expires: 1926-12-07
Abstract
No abstract record available.
Inventors
- 👤 Carl G Sprado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:42
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; Y; Y10; Y10T; Y10T403/00; Y10T403/29; Y10T403/297; Y10T403/57; Y10T403/5741; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2151
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) | 1912-05-31 | 1912-11-30 | 1913-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-31 | 1916-11-30 | 1917-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-31 | 1920-11-30 | 1921-06-01 | $7700.00 | Window Closed / Lapsed |