Patent US3313306A successfully refreshed from Google Patents.
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 20:23
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
References Cited (Backward Citations)
CA641730A
Cited
CA659225A
Cited
US2688390A
Cited
US2796810A
Cited
US2794480A
Cited
US2916038A
Cited
US2854985A
Cited
US2849005A
Cited
US3079978A
Cited
US3106501A
Cited
US3150668A
Cited
US3095343A
Cited
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 |