US2854028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable surge chamber and/or accumulator
Assignee: Commonwealth Engineering Company of Ohio
•
Filing: 1955-09-29
•
Granted: 1958-09-30
•
Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 James W Ballard
- 👤 Brier Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/08; F16K7/04; F16K7/06; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; Y; Y10; Y10T; Y10T74/00; Y10T74/11
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |