US3452875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipeline thickener
Assignee: Improved Machinery Inc
•
Filing: 1967-12-29
•
Granted: 1969-07-01
•
Expires: 1987-12-29
Abstract
No abstract record available.
Inventors
- 👤 John P Rich
- 👤 Lawrence Allan Carlsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:26
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/44; B01D33/48; B01D33/50; B01D33/506; B01D33/70; B01D33/74; B01D33/742; B01D2201/00; B01D2201/28; B01D2201/282; B01D2201/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2283495A
Cited
US3241677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |