US2998819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat reducing cigarette filter
Assignee: Individual
•
Filing: 1958-06-02
•
Granted: 1961-09-05
•
Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Snowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:14
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE238091C
Cited
US205345A
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US1183339A
Cited
US1605059A
Cited
US1969834A
Cited
US2216303A
Cited
US2445476A
Cited
US2669995A
Cited
US2728346A
Cited
US2827903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |