US3505299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of finely divided organic particles from a colloidal solution thereof
Assignee: PQ Corp
•
Filing: 1965-06-25
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Granted: 1970-04-07
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Chester L Baker
- 👤 John Frankle Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:15
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/22; B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B01J2/08; C08B3/26; C08B3/28; C08J; C08J3/00; C08J3/12; C08J3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1392849A
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US2481876A
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US2691008A
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US2948701A
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US2972594A
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US2958578A
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US3208823A
Cited
US3244679A
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US3297612A
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US3232915A
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US3258453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |