US2793572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of making filters
Assignee: P Lorillard Co
•
Filing: 1952-05-02
•
Granted: 1957-05-28
•
Expires: 1972-05-02
Abstract
No abstract record available.
Inventors
- 👤 Harris B Parmele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:30
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |