US3549161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power assist hand truck
Assignee: JOSEPH E OLSON
•
Filing: 1968-09-20
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Granted: 1970-12-22
•
Expires: 1988-09-20
Abstract
No abstract record available.
Inventors
- 👤 Russell J Pusztay
- 👤 Joseph E Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/04; B62B3/06; B62B3/0618; B62B3/0606; B62B5/00; B62B5/0026; B62B5/06; B62B5/063; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558; Y10T74/1577; Y10T74/1579
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |