US3371779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of minerals
Assignee: Hexion Inc
•
Filing: 1965-06-24
•
Granted: 1968-03-05
•
Expires: 1985-06-24
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Hollingsworth
- 👤 Bobby L Sapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:30
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1406; B01; B01F; B01F25/00; B01F25/20; B01F25/21; B01F25/211; B03D1/02; B03D1/028; B03D1/08; B03D1/082; B03D1/1412; B03D1/1431; B03D1/1443; B03D1/1456; B03D1/1462; B03D1/24; B03D1/245; B03D1/1493
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |