US2854154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sea elevator
Assignee: Individual
•
Filing: 1956-03-21
•
Granted: 1958-09-30
•
Expires: 1976-03-21
Abstract
No abstract record available.
Inventors
- 👤 Hepinstall Robert Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
B; B66; B66B; B66B9/00; B66C; B66C9/00; B66C9/14; B66C2700/00; B66C2700/03; B66C2700/0385
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1177751A
Cited
US637143A
Cited
US685579A
Cited
US691719A
Cited
US820464A
Cited
US1079159A
Cited
GB269801A
Cited
US2402789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |