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Patent US2597553A successfully refreshed from Google Patents.
US2597553A
Expired / Lapsed
US
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Apparatus for lubricating plastic materials undergoing extrusion
Assignee: Individual
•
Filing: 1948-09-17
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Granted: 1952-05-20
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Expires: 1968-09-17
Abstract
No abstract record available.
Inventors
- 👤 Donald J Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/25; B29C48/94; B29C48/07; B29C48/08; B29C48/09; B29C48/12; B29C48/30; B29C48/32; Y; Y10; Y10S; Y10S425/00; Y10S425/115
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |