US2690802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for stamping and stacking filter elements
Assignee: LUBER FINER Inc
•
Filing: 1952-08-07
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Granted: 1954-10-05
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Expires: 1972-08-07
Abstract
No abstract record available.
Inventors
- 👤 John K Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:44
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/02; B21; B21D; B21D43/00; B21D43/02; B21D43/04; B21D43/05; B21D43/20; B21D43/22; B26F1/38; B26F1/40; B29; B29C; B29C51/00; B29C51/26; B29C51/44; B29C51/445; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0448; Y10T83/0524; Y10T83/0529; Y10T83/202; Y10T83/2033; Y10T83/2037; Y10T83/2063; Y10T83/444; Y10T83/4577
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729123A
Cited
US1694939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |