US2980204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for filtering gas
Assignee: United Gas Improvement Co
•
Filing: 1959-08-04
•
Granted: 1961-04-18
•
Expires: 1979-08-04
Abstract
No abstract record available.
Inventors
- 👤 Claude W Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:11
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D46/12; C; C07; C07J; C07J3/00; C07J41/00; C07J5/00; C07J7/00; C07J75/00; F; F16; F16L; F16L55/00; F16L55/24; F17; F17D; F17D3/00; F17D3/16; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2251964A
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US2579984A
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US2629459A
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US2798850A
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US2784132A
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US2774443A
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US2835341A
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US2843341A
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US2888095A
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US2821261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |