Patent US2742829A successfully refreshed from Google Patents.
US2742829A
Expired / Lapsed
US
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Portable continuous metal membrane airfield surfacing and subseal
Assignee: Individual
•
Filing: 1951-12-14
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Granted: 1956-04-24
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Expires: 1971-12-14
Abstract
No abstract record available.
Inventors
- 👤 Francis K Bagby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:45
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1277936A
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US1705160A
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US1569702A
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US1921822A
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GB407433A
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GB423498A
Cited
US2096469A
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US2044498A
Cited
US2211649A
Cited
US2344131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |