US1647747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extensible spindle
Assignee: FRANK V ELBERTZ
•
Filing: 1924-08-04
•
Granted: 1927-11-01
•
Expires: 1944-08-04
Abstract
No abstract record available.
Inventors
- 👤 Prokop John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:27
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/028; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17291; Y10T279/17299; Y10T279/17991; Y10T403/00; Y10T403/32; Y10T403/32254
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) | 1930-10-31 | 1931-05-02 | 1931-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-10-31 | 1935-05-02 | 1935-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-10-31 | 1939-05-02 | 1939-11-01 | $7700.00 | Window Closed / Lapsed |