US2634602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocked building blocks
Assignee: PREC BUILDING SYSTEM Inc
•
Filing: 1948-02-25
•
Granted: 1953-04-14
•
Expires: 1968-02-25
Abstract
No abstract record available.
Inventors
- 👤 Harold F Zagray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:44
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/42; E04B2/52; E04B5/00; E04B5/02; E04B5/08; E04B5/44; E04B2002/0202; E04B2002/0204; E04B2002/0208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US738643A
Cited
GB190308387A
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US960217A
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FR415757A
Cited
US1154546A
Cited
FR21481E
Cited
US1378735A
Cited
US1623094A
Cited
FR611679A
Cited
US2075560A
Cited
FR813211A
Cited
GB546392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |