Patent US2575131A successfully refreshed from Google Patents.
US2655846A
Expired / Lapsed
US
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Large sized concrete area adapted for airplane runways and the like
Assignee: Individual
•
Filing: 1948-09-23
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Granted: 1953-10-20
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Expires: 1968-09-23
Abstract
No abstract record available.
Inventors
- 👤 Freyssinet Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:36
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/10; E01C7/14; E01C7/16; E01C11/00; E01C11/02; E01C11/04; E01C11/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1739102A
Cited
US1507282A
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US1740119A
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US1809870A
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US2251672A
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US2174035A
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US2329670A
Cited
US2338785A
Cited
US2315894A
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US2329189A
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US2319105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |