US2686572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption filter device
Assignee: CROP KING Co
•
Filing: 1952-01-17
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Granted: 1954-08-17
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Expires: 1972-01-17
Abstract
No abstract record available.
Inventors
- 👤 Eric C Cameron
- 👤 Verle W Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:43
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0446; B01D2253/00; B01D2253/10; B01D2253/102; B01D2258/00; B01D2258/02; B01D2258/0275; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40084; B01D2259/402; B01D2259/45; B01D2259/4508; B01D2259/455
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |