US1413503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile-base expander
Assignee: Individual
•
Filing: 1920-12-16
•
Granted: 1922-04-18
•
Expires: 1940-12-16
Abstract
No abstract record available.
Inventors
- 👤 Carlton A Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/34; E02D5/38; E02D5/44; E21; E21B; E21B7/00; E21B7/28; E21B7/30
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) | 1925-04-17 | 1925-10-17 | 1926-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-04-17 | 1929-10-17 | 1930-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-04-17 | 1933-10-17 | 1934-04-18 | $7700.00 | Window Closed / Lapsed |