US2789869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoist for ceiling material
Assignee: Individual
•
Filing: 1955-03-30
•
Granted: 1957-04-23
•
Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Joel A Hammagren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:01
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/18; E04F21/1805; E04F21/1822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US255991A
Cited
US797368A
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US1119734A
Cited
US1339482A
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US1639962A
Cited
US2059402A
Cited
US2285901A
Cited
US2371561A
Cited
US2465206A
Cited
US2590617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |