US2669442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annealing apparatus
Assignee: Crown Cork and Seal Co Inc
•
Filing: 1948-08-24
•
Granted: 1954-02-16
•
Expires: 1968-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jr John E Erhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:11
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/561
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1727192A
Cited
US1840661A
Cited
US1765955A
Cited
US1844658A
Cited
US1834207A
Cited
US1811522A
Cited
US2129670A
Cited
US2279511A
Cited
US2175233A
Cited
US2222362A
Cited
US2345181A
Cited
US2521044A
Cited
GB557029A
Cited
US2375317A
Cited
US2441500A
Cited
US2585277A
Cited
US2491828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |