US2932171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for raising and lowering large movable structures
Assignee: Cutler Hammer Inc
•
Filing: 1957-11-04
•
Granted: 1960-04-12
•
Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Richard R Ranson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:01
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; B; B66; B66C; B66C13/00; B66C13/18; B66C13/22; B66C13/23; B66C13/26; E04G21/163; B66C2700/00; B66C2700/08; B66C2700/081
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA544417A
Cited
US2192510A
Cited
US2400685A
Cited
US2353388A
Cited
US2353389A
Cited
US2367580A
Cited
US2526252A
Cited
US2603145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |