US2765976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage compressor
Assignee: Pennsylvania Pump & Compressor
•
Filing: 1952-03-14
•
Granted: 1956-10-09
•
Expires: 1972-03-14
Abstract
No abstract record available.
Inventors
- 👤 Warren A Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:20
CPC Classifications
F; F04; F04B; F04B27/00; F04B27/04; F04B27/053; F04B25/00; F04B25/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1055239A
Cited
US1118739A
Cited
US1580435A
Cited
US1435135A
Cited
US2312335A
Cited
US2610785A
Cited
US2574814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |