US2968818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient supporting structures
Assignee: Individual
•
Filing: 1958-12-16
•
Granted: 1961-01-24
•
Expires: 1978-12-16
Abstract
No abstract record available.
Inventors
- 👤 Earl L Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:09
CPC Classifications
A; A47; A47C; A47C19/00; A47C19/02; A47C19/021; A47C19/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US912855A
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US1233499A
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US1647247A
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US1697082A
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US1734776A
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US1934893A
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US2241039A
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US2516801A
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US2503333A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |