US3475885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retainer for purification media for gas from sewer line vents
Assignee: Individual
•
Filing: 1968-05-02
•
Granted: 1969-11-04
•
Expires: 1988-05-02
Abstract
No abstract record available.
Inventors
- 👤 Millard F Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2767968A
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US2784801A
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US3200387A
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US3248858A
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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) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |