Patent US3513980A successfully refreshed from Google Patents.
US3513980A
Expired / Lapsed
US
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Filter tube securing means
Assignee: Filterite Corp
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Filing: 1967-12-08
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Granted: 1970-05-26
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Expires: 1987-12-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Masaschi
- 👤 Charles A Miller Jr
- 👤 Robert W Miller Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:29
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/88; B01D29/90; B01D29/902; B01D29/96; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0438; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |