US2920631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing hollow tipped filter tips for cigarettes
Assignee: Koerber & Co KG
•
Filing: 1956-04-17
•
Granted: 1960-01-12
•
Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 Korber Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:02
CPC Classifications
A; A24; A24C; A24C5/00; A24C5/47; A24C5/476; Y; Y10; Y10S; Y10S280/00; Y10S280/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB430786A
Cited
GB428549A
Cited
US2205943A
Cited
DE814721C
Cited
US2649761A
Cited
FR1098950A
Cited
US2740409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |