US2449436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for preventing explosions
Assignee: Cardox Corp
•
Filing: 1945-06-09
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Granted: 1948-09-14
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Expires: 1965-06-09
Abstract
No abstract record available.
Inventors
- 👤 Hilding V Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:37
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/002; B65; B65D; B65D90/00; B65D90/22; B65D90/38; B65D90/44; B01J2219/00; B01J2219/00049; B01J2219/00245; B01J2219/00259; B01J2219/00263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |