US2719443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Rohr Inc
•
Filing: 1953-03-16
•
Granted: 1955-10-04
•
Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Derbyshire Charles Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:33
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US442898A
Cited
US1194653A
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US1067616A
Cited
US1473364A
Cited
US1852534A
Cited
US1964024A
Cited
US2133477A
Cited
US2618148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |