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US4342811B1
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US4342811B1 - - Google Patents
Assignee: 3M Co
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Filing: 1979-12-28
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Granted: 1985-02-10
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Expires: 1999-12-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:26
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28028; B01J20/28002; B01J20/28004; B01J20/28023; B01J20/28026; B01J20/28033; B01J20/28042; C; C08; C08J; C08J9/00; C08J9/26; D; D01; D01F; D01F1/00; D01F1/02; D01F1/08; D01F1/10; Y; Y10; Y10S; Y10S521/00; Y10S521/918; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249978; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/298
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) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-10 | 1996-08-11 | 1997-02-10 | $7700.00 | Window Closed / Lapsed |