US2904830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air relief valve for a plastics extrusion ram
Assignee: Continental-Diamond Fibre Corp
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Filing: 1957-07-26
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Granted: 1959-09-22
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Expires: 1977-07-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward A Mulrooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:40
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/58; B29C45/586; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/36; B29C48/475; Y; Y10; Y10S; Y10S425/00; Y10S425/812
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |