Patent US2351121A successfully refreshed from Google Patents.
US2351121A
Expired / Lapsed
US
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Curved structure
Assignee: Individual
•
Filing: 1941-05-06
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Granted: 1944-06-13
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Expires: 1961-05-06
Abstract
No abstract record available.
Inventors
- 👤 Hart Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/06; B64C1/061; B64C1/062; F; F41; F41H; F41H5/00; F41H5/02; B64C2001/0054; B64C2001/0063; B64C2001/0072; B64C2001/0081; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10S; Y10S428/00; Y10S428/911; Y10S493/00; Y10S493/968; Y10T; Y10T428/00; Y10T428/19; Y10T428/24; Y10T428/24752
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) | 1947-06-13 | 1947-12-13 | 1948-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-13 | 1951-12-13 | 1952-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-13 | 1955-12-13 | 1956-06-13 | $7700.00 | Window Closed / Lapsed |