US2257770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam grid
Assignee: AMERICAN DIAGRID Corp
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Filing: 1940-11-30
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Granted: 1941-10-07
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Expires: 1960-11-30
Abstract
No abstract record available.
Inventors
- 👤 Szego Steven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:41
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/044; F16B7/048; F16B7/0493; E; E04; E04B; E04B1/00; E04B1/343; E04B1/344; E04B1/3441; E04B1/38; E04B1/58; E04B1/5825; E04B1/5837; E04B1/585; E04B5/00; E04B5/02; E04B5/14; E04B7/00; E04B7/02
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) | 1944-10-06 | 1945-04-07 | 1945-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-10-06 | 1949-04-07 | 1949-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-10-06 | 1953-04-07 | 1953-10-07 | $7700.00 | Window Closed / Lapsed |