US2688770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for controlling the temperature of plastic material
Assignee: AT&T Inc
•
Filing: 1951-05-04
•
Granted: 1954-09-14
•
Expires: 1971-05-04
Abstract
No abstract record available.
Inventors
- 👤 George E Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/51; B29C48/515; B29C48/03; B29C48/07; B29C48/08; B29C48/78; B29C48/79; B29C48/80; B29C48/83; B29C48/832; B29C48/834; B29C48/84; B29C48/85; B29C48/875
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1951427A
Cited
US1964600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |