US2773459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective wall for use against radiation and explosive forces
Assignee: Individual
•
Filing: 1950-09-23
•
Granted: 1956-12-11
•
Expires: 1970-09-23
Abstract
No abstract record available.
Inventors
- 👤 Paul S Sechy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/10; G; G21; G21F; G21F3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE709C
Cited
US1160044A
Cited
US1222049A
Cited
US1282752A
Cited
US1427708A
Cited
US1836814A
Cited
US2003752A
Cited
US2110322A
Cited
GB478671A
Cited
GB518742A
Cited
GB520326A
Cited
US2405590A
Cited
US2312921A
Cited
US2564708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |