US2933738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-relieving pad
Assignee: Individual
•
Filing: 1957-10-14
•
Granted: 1960-04-26
•
Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 Katherine J Whelan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:34
CPC Classifications
A; A47; A47C; A47C20/00; A47C20/02; A47C20/027; A61; A61G; A61G7/00; A61G7/05; A61G7/057; A61G7/05723
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1123317A
Cited
US2343996A
Cited
GB560295A
Cited
US2659418A
Cited
US2700779A
Cited
US2728926A
Cited
US2782427A
Cited
US2819712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |