US2430652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the prevention of leakage in gas generators
Assignee: Humphreys and Glasgow Ltd
•
Filing: 1944-01-12
•
Granted: 1947-11-11
•
Expires: 1964-01-12
Abstract
No abstract record available.
Inventors
- 👤 Smith Joseph Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:51
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/061; C01B3/08; C01B3/10; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1090874A
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US1159865A
Cited
US1969422A
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US2080102A
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US2124573A
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US2204156A
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US2212835A
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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) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |