US3463689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming filters from fibrous material
Assignee: Sheller-Globe Corp
•
Filing: 1968-06-07
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Granted: 1969-08-26
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Expires: 1988-06-07
Abstract
No abstract record available.
Inventors
- 👤 Robert Palmai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/163; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/069; B01D2239/0695; B01D2239/10; Y; Y10; Y10S; Y10S55/00; Y10S55/05; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2607494A
Cited
US3061107A
Cited
US3170826A
Cited
US3347725A
Cited
US3304356A
Cited
US3390429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |