Patent US1804579A successfully refreshed from Google Patents.
Patent US2014950A successfully refreshed from Google Patents.
US2014950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas compressor
Assignee: Individual
•
Filing: 1930-08-12
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Granted: 1935-09-17
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Expires: 1950-08-12
Abstract
No abstract record available.
Inventors
- 👤 Henry D Pownall
- 👤 George L Pownall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:17
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/04; F04B27/0404; F04B27/0428; F04B27/0409; F04B27/0446; F04B27/053; F04B39/00; F04B39/02; F04B39/0223; F04B39/023; F04B39/0238; F04B39/0246; F04B39/10; F04B39/102; F04B39/1033
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) | 1938-09-16 | 1939-03-18 | 1939-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-16 | 1943-03-18 | 1943-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-16 | 1947-03-18 | 1947-09-17 | $7700.00 | Window Closed / Lapsed |