US3564628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated mattress with sealed foundation units
Assignee: Individual
•
Filing: 1968-06-06
•
Granted: 1971-02-23
•
Expires: 1988-06-06
Abstract
Abstract A MATTRESS CONSTRUCTION EMPLOYING A PLURALITY OF INDIVIDUAL AIR-TIGHT FOUNDATION UNITS INSERTED WITHIN THE INTERIOR OF A FOAM MATERIAL HOUSING IN A JUXTAPOSED RELATIONSHIP BUT WITHOUT BEING SECURED TO EACH OTHER OR TO THE HOUSING WALLS.
Inventors
- 👤 John A Oxford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:16
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/15; A47C27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |