US2806474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of filter elements
Assignee: Individual
•
Filing: 1954-06-23
•
Granted: 1957-09-17
•
Expires: 1974-06-23
Abstract
No abstract record available.
Inventors
- 👤 Yarsley Victor Emmanuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/22; A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; A24D3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A FILTER TIP CIGARETTE HAVING A FILTER ELEMENT CONSISTING AT LEAST IN PART OF "ACTIVE" CELLULOSE ACETATE FLAKE.
Claim 2
Dependent Claim
18 words
A FILTER TIP CIGARETTE HAVING A FILTER ELEMENT CONSISTING AT LEAST IN PART OF "ACTIVE" CELLULOSE ACETATE FLAKE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |