US1888018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator shaft construction
Assignee: Individual
•
Filing: 1930-07-11
•
Granted: 1932-11-15
•
Expires: 1950-07-11
Abstract
No abstract record available.
Inventors
- 👤 Shanafelt Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:06
CPC Classifications
B; B66; B66B; B66B7/00; B66B7/02; B66B7/023; B66B7/026; E; E21; E21D; E21D7/00; E21D7/02
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) | 1935-11-15 | 1936-05-16 | 1936-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-11-15 | 1940-05-16 | 1940-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-11-15 | 1944-05-16 | 1944-11-15 | $7700.00 | Window Closed / Lapsed |