US3432978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete wall and wall panel construction
Assignee: DONALD O ERICKSON
•
Filing: 1967-05-18
•
Granted: 1969-03-18
•
Expires: 1987-05-18
Abstract
No abstract record available.
Inventors
- 👤 Donald O Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:55
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/04; E04B1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CH50909A
Cited
US1385606A
Cited
US1375043A
Cited
US1477665A
Cited
AU354926A
Cited
US1702340A
Cited
US1972475A
Cited
US3173226A
Cited
US3292329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |