Patent US2453221A successfully refreshed from Google Patents.
US2453221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking building units
Assignee: ALBERT R JONES
•
Filing: 1944-07-21
•
Granted: 1948-11-09
•
Expires: 1964-07-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Haden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:24
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/0004; F16B5/0056; F16B5/0068; E; E04; E04B; E04B1/00; E04B1/343; E04B1/34315; E04B1/34321; E04B1/34384; E04B1/38; E04B1/61; E04B1/6108; E04B1/612; E04B1/6166; E04B1/617
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB190709223A
Cited
US1228317A
Cited
US1231289A
Cited
US1671113A
Cited
DE531314C
Cited
US2331752A
Cited
US2347049A
Cited
US2394443A
Cited
US2414060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |