Patent US2239817A successfully refreshed from Google Patents.
US2239817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure
Assignee: Individual
•
Filing: 1940-03-11
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Granted: 1941-04-29
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Expires: 1960-03-11
Abstract
No abstract record available.
Inventors
- 👤 Gilbert O Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/38; E04C3/40; E04B; E04B1/00; E04B1/18; E04B1/24; E04B1/2403; E04B2001/2463; E04B2001/2481; E04B2001/2493; E04B2001/2496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-28 | 1944-10-28 | 1945-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-28 | 1948-10-28 | 1949-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-28 | 1952-10-28 | 1953-04-29 | $7700.00 | Window Closed / Lapsed |