US3028978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling board lifter
Assignee: AARON F BARKER
•
Filing: 1958-12-23
•
Granted: 1962-04-10
•
Expires: 1978-12-23
Abstract
No abstract record available.
Inventors
- 👤 Jerry C Dickens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/18; E04F21/1805; E04F21/1811; B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1799307A
Cited
US2419813A
Cited
US2666212A
Cited
US2729196A
Cited
US2815251A
Cited
US2815132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |