US2804912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated cushion
Assignee: S E HYMAN CO
•
Filing: 1955-11-23
•
Granted: 1957-09-03
•
Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Clesson H Pickard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:55
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/62; A47C7/72; A47C7/74; A47C7/742; A47C7/36; A47C7/40; A47C7/42; A47C7/425; B; B60; B60N; B60N2/00; B60N2/56; B60N2/5607; B60N2/5621; B60N2/5635; B60N2/58; B60N2/60; B60N2/6018; B60N2/6054
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |