US2884133A
Expired / Lapsed
US
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Assignee: Purolator Products Inc
•
Filing: 1955-12-09
•
Granted: 1959-04-28
•
Expires: 1975-12-09
Abstract
No abstract record available.
Inventors
- 👤 Walulik Albert
- 👤 John R Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:56
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/005; B01D27/04; B01D27/06; B01D27/08; B01D27/10; B01D27/103; B01D27/106; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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US2743018A
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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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |