Patent US2968130A successfully refreshed from Google Patents.
US2968130A
Expired / Lapsed
US
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Protective underground shelter
Assignee: AMERICAN HOME SHELTERS
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Filing: 1957-11-29
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Granted: 1961-01-17
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Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Bascom Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/10; E04H9/12
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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |