US3499267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus for rotary drum filters
Assignee: FLAKTAIR Inc
•
Filing: 1968-08-20
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Granted: 1970-03-10
•
Expires: 1988-08-20
Abstract
No abstract record available.
Inventors
- 👤 James F King Jr
- 👤 Donald Alfred Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:31
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2495635A
Cited
US2981644A
Cited
US3000507A
Cited
US3166391A
Cited
US3339348A
Cited
US3360907A
Cited
US3345805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |