US2766481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and 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
2026-11-05 06:43
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/20; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US326021A
Cited
US2345086A
Cited
US2156508A
Cited
US2199209A
Cited
US2354260A
Cited
US2455509A
Cited
US2512506A
Cited
US2496625A
Cited
US2450436A
Cited
US2537977A
Cited
US2581769A
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 |