Patent US3907437A successfully refreshed from Google Patents.
US2809818A
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Gas and liquid contact apparatus
Assignee: Individual
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Filing: 1956-06-21
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Granted: 1957-10-15
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Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Munters Carl Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:42
CPC Classifications
F; F28; F28C; F28C1/00; F28C1/02; B; B01; B01D; B01D50/00; B01J; B01J19/00; B01J19/32; B01J19/325; F28F; F28F25/00; F28F25/02; F28F25/06; F28F25/08; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/3221; B01J2219/32213; B01J2219/32255; B01J2219/32258; B01J2219/324; B01J2219/32458; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |