US2550672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm anchoring means
Assignee: HYDRO FORM CORP
•
Filing: 1948-03-03
•
Granted: 1951-05-01
•
Expires: 1968-03-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Chyba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:26
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02; B; B21; B21D; B21D22/00; B21D22/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1703531A
Cited
US1904250A
Cited
US2106791A
Cited
US2100462A
Cited
US2220229A
Cited
US2175431A
Cited
US2229057A
Cited
US2317869A
Cited
US2446694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |