Patent US2766479A successfully refreshed from Google Patents.
US2766479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding cellular plastics
Assignee: AT&T Inc
•
Filing: 1952-08-28
•
Granted: 1956-10-16
•
Expires: 1972-08-28
Abstract
No abstract record available.
Inventors
- 👤 George E Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:42
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/03; B29C48/05; B29C48/06; B29C48/25; B29C48/30; B29C48/32; B29C48/34; B29L; B29L2031/00; B29L2031/34; B29L2031/3462
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US368591A
Cited
US2345086A
Cited
US2354260A
Cited
FR883883A
Cited
US2401551A
Cited
US2371679A
Cited
FR938214A
Cited
GB624699A
Cited
US2593198A
Cited
US2636218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |