US2721729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control mechanism for extrusion apparatus
Assignee: Individual
•
Filing: 1953-03-16
•
Granted: 1955-10-25
•
Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jurian W Van Riper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:34
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/87; B29C48/03; B29C48/80; B29C48/83; B29C48/832; B29C48/834; B29C48/865
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1354588A
Cited
US1484517A
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US1760065A
Cited
US1801099A
Cited
US2319482A
Cited
US2508988A
Cited
US2541201A
Cited
US2522365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |