US2764227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formed spring units and assemblies thereof
Assignee: American Metal Products Co
•
Filing: 1951-05-17
•
Granted: 1956-09-25
•
Expires: 1971-05-17
Abstract
No abstract record available.
Inventors
- 👤 Richard J Williams
- 👤 Hyland C Flint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US198423A
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GB232312A
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US2251049A
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US2332041A
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CH254466A
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US2602487A
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US2571184A
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US2526184A
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US2646108A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |