US3426421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making roll-type dies for continuously producing flat mats
Assignee: Seilon Inc
•
Filing: 1966-01-25
•
Granted: 1969-02-11
•
Expires: 1986-01-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Leedy
- 👤 John T Pope
- 👤 Harry M Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:40
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0057; B29L; B29L2031/00; B29L2031/30; B29L2031/3005; B29L2031/3017; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982; Y10T29/49984; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US283560A
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US375869A
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US395488A
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US1073105A
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US2204263A
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US2726973A
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US2726972A
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US2722261A
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US3142887A
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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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |