US2530940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall construction
Assignee: Individual
•
Filing: 1947-05-28
•
Granted: 1950-11-21
•
Expires: 1967-05-28
Abstract
No abstract record available.
Inventors
- 👤 Dahlin John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:00
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/70; E04B1/703; E04B2/00; E04B2/02; E04B2/42; E04B1/7038; E04B2002/0295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US375228A
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US514309A
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US948629A
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US738643A
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US761711A
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US800385A
Cited
US960562A
Cited
US1065762A
Cited
US1582735A
Cited
US1744185A
Cited
US1745765A
Cited
US1706893A
Cited
US1968680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |