US1901392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete form
Assignee: Individual
•
Filing: 1930-07-31
•
Granted: 1933-03-14
•
Expires: 1950-07-31
Abstract
No abstract record available.
Inventors
- 👤 John S Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:59
CPC Classifications
E; E04; E04G; E04G15/00; E04G15/02; E04G11/00; E04G11/06; E04G11/08; E04G11/10
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) | 1936-03-13 | 1936-09-12 | 1937-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-13 | 1940-09-12 | 1941-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-13 | 1944-09-12 | 1945-03-14 | $7700.00 | Window Closed / Lapsed |