US1874790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building material and retaining means therefor
Assignee: MORTENSON ENGINEERING Co
•
Filing: 1930-03-08
•
Granted: 1932-08-30
•
Expires: 1950-03-08
Abstract
No abstract record available.
Inventors
- 👤 Henry C Mortenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:15
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0801; E04F13/0803
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) | 1935-08-30 | 1936-02-29 | 1936-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-30 | 1940-02-29 | 1940-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-30 | 1944-02-29 | 1944-08-30 | $7700.00 | Window Closed / Lapsed |