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US2816663A
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Assignee: Purolator Products Inc
•
Filing: 1954-08-09
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Granted: 1957-12-17
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Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Julius P Kovacs
- 👤 Alfred A Leebardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:18
CPC Classifications
B; B31; B31D; B31D5/00; B31D5/0082; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/39; B01D29/41; B01D29/44; B01D29/48; B31C; B31C1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191109228A
Cited
US1688326A
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US1902435A
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US2083148A
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US2129697A
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US2088199A
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US2327686A
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US2312415A
Cited
GB635557A
Cited
US2538575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |