US2804292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-liquid contact apparatus
Assignee: Air Products Inc
•
Filing: 1952-10-21
•
Granted: 1957-08-27
•
Expires: 1972-10-21
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04763; F25J3/04866; F25J3/04896; F25J3/04927; B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/18; F25J3/04406; F25J3/04412; F25J3/04872; F25J3/04884; F25J5/00; F25J5/002; F25J5/005; F25J2250/00; F25J2250/02; F25J2250/20
Claims Analysis
Total Claims: 0
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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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |