US3481118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone separator
Assignee: 361818 ALBERTA Ltd #300 8657 - 51 AVENUE EDMONTON ALBERTA CANADA T6E 6A8
•
Filing: 1968-04-22
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Granted: 1969-12-02
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Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robin Burke Willis
- 👤 David Lloyd George Beattie
- 👤 Ferris George Swann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:39
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |