Patent US1470548A successfully refreshed from Google Patents.
US1470548A
Expired / Lapsed
US
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Electric motor-driven compressor
Assignee: Individual
•
Filing: 1921-06-28
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Granted: 1923-10-09
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Expires: 1941-06-28
Abstract
No abstract record available.
Inventors
- 👤 Spohrer Gregory John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:29
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-10-08 | 1927-04-09 | 1927-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-10-08 | 1931-04-09 | 1931-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-10-08 | 1935-04-09 | 1935-10-09 | $7700.00 | Window Closed / Lapsed |