US2562403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for building concrete walls
Assignee: Individual
•
Filing: 1947-02-20
•
Granted: 1951-07-31
•
Expires: 1967-02-20
Abstract
No abstract record available.
Inventors
- 👤 Ahart Joseph Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:51
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/06; E04G11/20; E04G11/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR494271A
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US1518149A
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US1995692A
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US1964208A
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GB443115A
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US2314468A
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US2396174A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |