Patent US2499421A successfully refreshed from Google Patents.
US2499421A
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US
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Polyethylene tape extrusion
Assignee: NAT PLASTIC PRODUCTS Co
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Filing: 1946-03-11
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Granted: 1950-03-07
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Expires: 1966-03-11
Abstract
No abstract record available.
Inventors
- 👤 Lee F Samler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:45
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/355; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92209; B29C2948/92323; B29C2948/92428; B29C2948/92504; B29C2948/9258; B29C2948/92609; B29C2948/92704; B29C2948/92733; B29C2948/92809; B29C2948/92819; B29C2948/92923; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2219700A
Cited
US2212770A
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US2177658A
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US2174779A
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US2242364A
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US2320115A
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US2261977A
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US2365374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |