Patent US2539129A successfully refreshed from Google Patents.
US2539129A
Expired / Lapsed
US
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Strainer for straining plastic material
Assignee: AT&T Inc
•
Filing: 1946-08-30
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Granted: 1951-01-23
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Expires: 1966-08-30
Abstract
No abstract record available.
Inventors
- 👤 Alvin N Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:31
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/69; B29C48/693; B29C48/03; B29C48/05; B29C48/06; Y; Y10; Y10T; Y10T137/00; Y10T137/794; Y10T137/7976
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US440971A
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US656804A
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US890527A
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US1007016A
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GB159403A
Cited
US1732618A
Cited
US1931872A
Cited
US2013009A
Cited
GB457347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |