US2443312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure cylinder
Assignee: HPM Development Corp
•
Filing: 1944-03-06
•
Granted: 1948-06-15
•
Expires: 1964-03-06
Abstract
No abstract record available.
Inventors
- 👤 George M Geiger
- 👤 Harold A Donnenwirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:51
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/222; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; F16; F16J; F16J10/00; F16J10/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1396243A
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US2112108A
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US784636A
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US1955292A
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US2107716A
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US2181343A
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US2235070A
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US2187217A
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US2372302A
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US2365162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |