US3494169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep drawing method and apparatus
Assignee: National Steel Corp
•
Filing: 1966-01-21
•
Granted: 1970-02-10
•
Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 William T Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D22/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1453652A
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USRE20009E
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US1550387A
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US1675910A
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US1967245A
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US2591061A
Cited
CH280900A
Cited
US3203218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |