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US2772828A
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Air compressor
Assignee: Westinghouse Air Brake Co
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Filing: 1952-10-25
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Granted: 1956-12-04
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Expires: 1972-10-25
Abstract
No abstract record available.
Inventors
- 👤 Rankin J Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:24
CPC Classifications
F; F04; F04B; F04B41/00; F04B41/06; F04B39/00; F04B39/06; F04B41/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US866457A
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US899720A
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US930567A
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US1182372A
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US1264562A
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US1467489A
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US1445073A
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US1891083A
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US2148638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |