US3313306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable elongated elements and smoking means incorporating the same
Assignee: Filtrona Richmond Inc
•
Filing: 1965-10-22
•
Granted: 1967-04-11
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Richard M Berger
- 👤 Reavis C Sproull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:30
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; A24D3/0225; A24D3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
A FILTER COMPRISING A STABLE, POROUS, ROD-LIKE ELEMENT CONSISTING ESSENTAILLY OF A TOW OF GENERALLY LONGITUDINALLY EXTENDING, FILAMENTARY MATERIAL BONDED TOGETHER THROUGHOUT TO BE SELF-SUSTANING, SAID ROD-LIKE ELEMENT ADDITIONALLY INCLUDING MEANS ON ITS PERIPHERAL SURFACE RENDERING THE SAME SUBSTANTAILLY RESISTENT TO FILAMENT SEPARATION, SAID ROD-LIKE ELEMENT AND MEANS TOGETHER HAVING SUBSTANTIALLY UNIFORM PHYSICAL CHARACTERISTICS AND POROSITY THROUGHOUT ANY COMPLETE TRANSVERSE CROSS-SECTIONAL AREAS OF THE ROD-LIKE ELEMENT AND MEANS, AT LEAST
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CA659225A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |