US2654124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacture of plastic edge type filters
Assignee: Purolator Products Inc
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Filing: 1951-07-20
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Granted: 1953-10-06
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Expires: 1971-07-20
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Layte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/0003; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/44; B01D29/48; B29C43/00; B29C43/22; B29C43/222; B29C48/00; B29C48/03; B29C48/09; B29C48/12; B29C53/00; B29C53/02; B29C53/12; B29C59/00; B29C59/02; B29C59/04; B29C59/043; B29L; B29L2031/00; B29L2031/14; Y; Y10; Y10S; Y10S264/00; Y10S264/40; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/51; Y10T29/5188; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/1241; Y10T428/12417
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042537A
Cited
US2411660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |