US3376696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filtering apparatus
Assignee: Dust Control Equipment Ltd
•
Filing: 1966-08-08
•
Granted: 1968-04-09
•
Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Wells
- 👤 Richard H Baxendale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/66; B01D46/70; B01D46/71
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB798267A
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US3061102A
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US3157370A
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US3151822A
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GB990587A
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US3233882A
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GB1016556A
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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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |