US3012590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing spring units
Assignee: Individual
•
Filing: 1957-10-30
•
Granted: 1961-12-12
•
Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick G Hodges
- 👤 Clarence J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
B; B21; B21F; B21F33/00; B21F33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603246A
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US1887215A
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US1948754A
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US2296878A
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US2388106A
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US2382226A
Cited
US2716308A
Cited
US2663038A
Cited
US2854034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |