US2630305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tower packing
Assignee: Pan American Refining Corp
•
Filing: 1949-04-29
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Granted: 1953-03-03
•
Expires: 1969-04-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Scofield
- 👤 Krahe Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:55
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/32; F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/3221; B01J2219/32213; B01J2219/32224; B01J2219/32231; B01J2219/32279; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1436483A
Cited
US1749266A
Cited
US2047444A
Cited
US2336060A
Cited
US2332110A
Cited
US2470652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |