Patent US2544983A successfully refreshed from Google Patents.
US2544983A
Expired / Lapsed
US
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Interlocking building slab
Assignee: Individual
•
Filing: 1946-11-07
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Granted: 1951-03-13
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Expires: 1966-11-07
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:09
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/06; E04B2002/0202; E04B2002/0232; E04B2002/0234
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR337806A
Cited
US1088040A
Cited
US1291160A
Cited
US1430431A
Cited
US1338509A
Cited
US1749303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |