Patent US4500670B1 successfully refreshed from Google Patents.
US4500670B1
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Composite mixtures for improving gel strength of water absorbent gels
Assignee: Dow Chemical Co
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Filing: 1983-11-22
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Granted: 1994-12-27
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Expires: 2003-11-22
Abstract
No abstract record available.
Inventors
- 👤 Mark J Mckinley
- 👤 Dan P Sheridan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:48
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; A; A61; A61L; A61L15/00; A61L15/16; A61L15/18; A61L15/42; A61L15/60; C08J; C08J3/00; C08J3/20; C08J3/203; C08J2300/00; C08J2300/14; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10S524/916
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |