US2439246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure welding machine
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1944-03-11
•
Granted: 1948-04-06
•
Expires: 1964-03-11
Abstract
No abstract record available.
Inventors
- 👤 Emil F Gibian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
B; B23; B23K; B23K13/00; B23K20/00; B23K20/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/94; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49307; Y10T29/49314
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1152610A
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US1826549A
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US1904430A
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US1775311A
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US1915047A
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US2024906A
Cited
US2231027A
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US2276354A
Cited
US2273609A
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US2350716A
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US2280689A
Cited
US2382779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |