US2653468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bombproof building structure
Assignee: Individual
•
Filing: 1949-12-31
•
Granted: 1953-09-29
•
Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Rowles William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:21
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/10; E04B; E04B1/00; E04B1/343; E04B1/34363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR434015A
Cited
US1353798A
Cited
US1343794A
Cited
US1480248A
Cited
US1584294A
Cited
US2116370A
Cited
US2189486A
Cited
GB526019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |