US1420478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction
Assignee: Individual
•
Filing: 1920-12-11
•
Granted: 1922-06-20
•
Expires: 1940-12-11
Abstract
No abstract record available.
Inventors
- 👤 Walter R Forbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:09
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/41; E04B1/4178; E04B1/4185; E04B2/00; E04B2/02; E04B2/28; E04B2/30; E04B2/34; E04B2002/0202; E04B2002/0243; E04B2002/025
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) | 1925-06-19 | 1925-12-19 | 1926-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-06-19 | 1929-12-19 | 1930-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-06-19 | 1933-12-19 | 1934-06-20 | $7700.00 | Window Closed / Lapsed |