US2641800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for advancing and working plastic compounds
Assignee: AT&T Inc
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Filing: 1951-06-21
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Granted: 1953-06-16
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Expires: 1971-06-21
Abstract
No abstract record available.
Inventors
- 👤 Hubert A Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:23
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/05; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29C48/36; B29C48/395; B29C48/78; B29C48/80; B29C48/84; B29C48/85; B29C48/875
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB380178A
Cited
US2135325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |