US3489287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weir construction
Assignee: FMC Corp
•
Filing: 1968-11-19
•
Granted: 1970-01-13
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Expires: 1988-11-19
Abstract
No abstract record available.
Inventors
- 👤 Philip B Streander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:37
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/02; B01D21/04; B01D21/0039; B01D21/0042; B01D21/18; B01D21/183; B01D21/24; B01D21/2405; B01D21/2427; B01D21/245; B01D21/2455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |