Patent US3549705A successfully refreshed from Google Patents.
US3549705A
Expired / Lapsed
US
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Hexafluoroisopropanol acrylamide
Assignee: ChampionX LLC
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Filing: 1969-05-28
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Granted: 1970-12-22
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Expires: 1989-05-28
Abstract
No abstract record available.
Inventors
- 👤 Elemer Domba
- 👤 Thaddeus A Krolikiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:46
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/285; D06M15/295; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58; D06M13/00; D06M13/322; D06M13/402; D06M13/41
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |