Patent US3768649A successfully refreshed from Google Patents.
Patent US3023089A successfully refreshed from Google Patents.
Patent US3534371A successfully refreshed from Google Patents.
US2815901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor structure
Assignee: HALE CONDENSER Co Inc
•
Filing: 1953-08-25
•
Granted: 1957-12-10
•
Expires: 1973-08-25
Abstract
No abstract record available.
Inventors
- 👤 William B Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:28
CPC Classifications
F; F04; F04B; F04B35/00; F04B27/00; F04B39/00; F04B39/10; F04B39/12; F04B39/128; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18152
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US999220A
Cited
US1633772A
Cited
US1628096A
Cited
US1734085A
Cited
US1974964A
Cited
US2559067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |