US3191728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal panel and its application in an anti-blast barrier in particular for air-ports
Assignee: Individual
•
Filing: 1961-12-27
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Granted: 1965-06-29
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 David Louis Fernand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:56
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/427; B; B21; B21D; B21D31/00; B21D31/04; B64; B64F; B64F1/00; B64F1/26; E04B; E04B1/00; E04B1/62; E04B1/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |