US2569896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall structure
Assignee: Martin Parry Corp
•
Filing: 1945-09-07
•
Granted: 1951-10-02
•
Expires: 1965-09-07
Abstract
No abstract record available.
Inventors
- 👤 Walter A Mayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/76; E04B2/78; E04B2/7854
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US498859A
Cited
US2169274A
Cited
US997677A
Cited
US1420473A
Cited
US1856995A
Cited
US1842094A
Cited
US1946268A
Cited
US2020502A
Cited
US1993499A
Cited
US1960077A
Cited
US1999605A
Cited
US2202861A
Cited
US2313839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |