US1151583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obstetrical tractor.
Assignee: Individual
•
Filing: 1915-03-08
•
Granted: 1915-08-31
•
Expires: 1935-03-08
Abstract
No abstract record available.
Inventors
- 👤 Henry Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/42; A61B17/44
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) | 1918-08-30 | 1919-03-01 | 1919-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-08-30 | 1923-03-01 | 1923-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-08-30 | 1927-03-01 | 1927-08-31 | $7700.00 | Window Closed / Lapsed |