US2858394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure mat
Assignee: Individual
•
Filing: 1957-06-11
•
Granted: 1958-10-28
•
Expires: 1977-06-11
Abstract
No abstract record available.
Inventors
- 👤 Hopkins Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:03
CPC Classifications
E; E05; E05F; E05F13/00; E05F13/04; E05F15/00; E05F15/40; E05F15/42; E05F15/47; E05F15/50; E05F15/70; E05F15/73; E05F15/75; H; H01; H01H; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H3/142; H01H3/22; H01H3/24
Claims Analysis
Total Claims: 0
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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) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |