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US3428054A
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Assignee: Chemway Filters Inc
•
Filing: 1965-10-18
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Granted: 1969-02-18
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Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Bruno U Scarabello
- 👤 Emilio A Perez
- 👤 Lloyd G Welty
- 👤 Simon J Sluter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:38
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985840A
Cited
US2108860A
Cited
US2579984A
Cited
GB757841A
Cited
US2768913A
Cited
US3251365A
Cited
US3217715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |