Patent US2940296A successfully refreshed from Google Patents.
US2940296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spaced panel wall structure
Assignee: Individual
•
Filing: 1957-01-14
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Granted: 1960-06-14
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Lester G Gaspar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:29
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/84; E04B2/86; E04B2/8635; E04B2002/8688
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911626A
Cited
US838844A
Cited
US875983A
Cited
FR510785A
Cited
US2074563A
Cited
US2133605A
Cited
US2295216A
Cited
US2280832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |