Patent US2904836A successfully refreshed from Google Patents.
US2904836A
Expired / Lapsed
US
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Centrifugal casting apparatus particularly for plastic tubing
Assignee: DELUXE COILS Inc
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Filing: 1956-04-05
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Granted: 1959-09-22
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Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert O Jefferson
- 👤 Trinkle Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:59
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/34; B29C33/36; B29C41/00; B29C41/02; B29C41/04; B29C41/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1745424A
Cited
FR658257A
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US1785586A
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US1787742A
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US2023381A
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US1992739A
Cited
US2043956A
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US2278858A
Cited
US2491890A
Cited
US2517974A
Cited
US2671260A
Cited
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 |