US2878990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upright piston compressor
Assignee: Sulzer AG
•
Filing: 1953-10-30
•
Granted: 1959-03-24
•
Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 Zurcher Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:22
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/02; F04B39/0284; F04B39/0292; F04B39/04; F04B39/041; F04B39/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1233438A
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US1375376A
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US1557706A
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US1428473A
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US1633699A
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US1937859A
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US2109541A
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US2204374A
Cited
US2468509A
Cited
US2765976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |