US2810920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mattress
Assignee: Individual
•
Filing: 1955-05-09
•
Granted: 1957-10-29
•
Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Walter T Carruth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:04
CPC Classifications
A; A47; A47C; A47C20/00; A47C20/02; A47C20/026; A47C27/00; A47C27/12; A47C27/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US211114A
Cited
US682871A
Cited
US1098327A
Cited
US1276655A
Cited
US1242598A
Cited
US1437568A
Cited
US1635588A
Cited
CH191087A
Cited
US2239003A
Cited
US2244435A
Cited
US2634435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |