US2883060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hood closed sludge channel
Assignee: Individual
•
Filing: 1956-12-10
•
Granted: 1959-04-21
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Llewellyn B Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:12
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/10; B01D21/24; B01D21/2433; B01D21/245; B01D21/30; B01D21/302; B01D21/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2732944A
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US2551334A
Cited
US2545425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |