US2730296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloader mechanism for compressors
Assignee: Worthington Corp
•
Filing: 1952-08-09
•
Granted: 1956-01-10
•
Expires: 1972-08-09
Abstract
No abstract record available.
Inventors
- 👤 George W Hartwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:44
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B49/243
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US858468A
Cited
US2040964A
Cited
US1936411A
Cited
US2062052A
Cited
US2274338A
Cited
US2389348A
Cited
US2443286A
Cited
US2681177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |