US1755728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination make-up cathead and friction hoist
Assignee: Individual
•
Filing: 1927-05-23
•
Granted: 1930-04-22
•
Expires: 1947-05-23
Abstract
No abstract record available.
Inventors
- 👤 Walter W Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:23
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/008; E21B19/16; E21B19/161; E21B19/162
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) | 1933-04-21 | 1933-10-21 | 1934-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-21 | 1937-10-21 | 1938-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-21 | 1941-10-21 | 1942-04-22 | $7700.00 | Window Closed / Lapsed |