US3114388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Undular springs for compressor valves
Assignee: Grassos Koniklijke Machinefabrieken NV
•
Filing: 1960-07-28
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Granted: 1963-12-17
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Expires: 1980-07-28
Abstract
No abstract record available.
Inventors
- 👤 Hoen Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:06
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B39/1033; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA528424A
Cited
US1768842A
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US1386735A
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US1689608A
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US1722478A
Cited
US2213259A
Cited
US2679378A
Cited
FR1106745A
Cited
US2886380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |