US2438759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of composite steel plates
Assignee: Individual
•
Filing: 1941-05-21
•
Granted: 1948-03-30
•
Expires: 1961-05-21
Abstract
No abstract record available.
Inventors
- 👤 Liebowitz Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/011; B23; B23K; B23K20/00; B23K20/04; B23K20/22; B23K20/227; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0442; F41H5/045; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10S428/941; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12632; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958; Y10T428/12965
Claims Analysis
Total Claims: 0
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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) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |