US2048710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for building underground structures and apparatus therefor
Assignee: Individual
•
Filing: 1932-11-25
•
Granted: 1936-07-28
•
Expires: 1952-11-25
Abstract
No abstract record available.
Inventors
- 👤 Ranney Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:52
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/04; E02D; E02D17/00; E02D17/13; E02D19/00; E02D19/06; E02D19/12; E02D19/16; E02F3/00; E02F3/04; E02F3/08; E02F3/12; E02F3/14; E02F3/143; E02F5/06; E02F5/12; E21; E21B; E21B7/00; E21B7/001; E21B7/003
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) | 1939-07-28 | 1940-01-27 | 1940-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-28 | 1944-01-27 | 1944-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-28 | 1948-01-27 | 1948-07-28 | $7700.00 | Window Closed / Lapsed |