US2554499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure apparatus
Assignee: IIT Research Institute
•
Filing: 1947-09-08
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Granted: 1951-05-29
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Expires: 1967-09-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Poulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:00
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/065; B30; B30B; B30B11/00; B30B11/004; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123416A
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US331737A
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US1609460A
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US2232103A
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US2272449A
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US2330762A
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US2423915A
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US2448277A
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US2482342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |