US2762433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for perforating a strip of filter material for use in a filter element
Assignee: LUBER FINER Inc
•
Filing: 1952-07-11
•
Granted: 1956-09-11
•
Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 John K Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:00
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/24; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B26D; B26D7/00; B26D7/26; B26D7/2628; B29; B29C; B29C43/00; B29C43/22; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/478; Y10T83/4795; Y10T83/483; Y10T83/4833; Y10T83/4838; Y10T83/4841; Y10T83/929; Y10T83/9314
Claims Analysis
Total Claims: 0
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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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |