Patent US2878649A successfully refreshed from Google Patents.
US2878649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable bearing shoes for caissons
Assignee: California Research LLC
•
Filing: 1954-05-19
•
Granted: 1959-03-24
•
Expires: 1974-05-19
Abstract
No abstract record available.
Inventors
- 👤 Frank C Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/50; E; E02; E02B; E02B17/00; E02B17/02; E02B17/021; E02D; E02D5/00; E02D5/22; E02D5/54; E02B2017/0039; E02B2017/0047; E02B2017/0056; E02B2017/0073; E02B2017/0082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR501464A
Cited
DE504895C
Cited
US1982687A
Cited
US1915331A
Cited
US2468729A
Cited
US2540878A
Cited
FR989975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |