Patent US3252170A successfully refreshed from Google Patents.
US3252170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable firmness mattress
Assignee: Individual
•
Filing: 1963-08-08
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Granted: 1966-05-24
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Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 James R Frye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:25
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0433; A47C23/0435; Y; Y10; Y10T; Y10T24/00; Y10T24/36; Y10T24/367
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A VARIABLE FIRMNESS MATTRESS COMPRISING A BOTTOM FRAME AND EDGE BOLSTERS, A COVER PAD, AN UPPER LAYER OF VERTICALLY EXTENDING COIL SPRINGS, A DIVIDING WALL BENEATH SAID UPPER LAYER OF SPRINGS, A LOWER LAYER OF VERTICALLY EXTENDING COIL SPRINGS BENEATH SAID DIVIDING WALL AND IN VERTICAL ALIGNMENT WITH SAID UPPER SPRINGS, CENTRAL ROD MEANS CONNECTING THE UPPER END OF EACH OF SAID UPPER SPRINGS TO THE UPPER END OF A CORRESPONDING LOWER SPRING, SAID ROD MEANS BEING SLIDABLY RECEIVED THROUGH SAID DIVIDING WALL, A VERTICALLY MOVABLE ELEVATOR PLATFORM POSITIONED BENEATH SAID LOWER SPRINGS, A JACKSCREW BENEATH SAID ELEVATOR PLATFORM, A PAIR OF BEARING BLOCKS THREADED OVER SAID JACKSCREW, PIVOTED LINKS JOINING SAID BEARING BLOCKS TO SAID ELEVATOR PLATFROM AND SAID BOTTOM FRAME, AND MEANS FOR SELECTIVELY ROTATING SAID JACKSCREW IN OPPOSITE DIRECTIONS.
Claim 2
Dependent Claim
132 words
A VARIABLE FIRMNESS MATTRESS COMPRISING A BOTTOM FRAME AND EDGE BOLSTERS, A COVER PAD, AN UPPER LAYER OF VERTICALLY EXTENDING COIL SPRINGS, A DIVIDING WALL BENEATH SAID UPPER LAYER OF SPRINGS, A LOWER LAYER OF VERTICALLY EXTENDING COIL SPRINGS BENEATH SAID DIVIDING WALL AND IN VERTICAL ALIGNMENT WITH SAID UPPER SPRINGS, CENTRAL ROD MEANS CONNECTING THE UPPER END OF EACH OF SAID UPPER SPRINGS TO THE UPPER END OF A CORRESPONDING LOWER SPRING, SAID ROD MEANS BEING SLIDABLY RECEIVED THROUGH SAID DIVIDING WALL, A VERTICALLY MOVABLE ELEVATOR PLATFORM POSITIONED BENEATH SAID LOWER SPRINGS, A JACKSCREW BENEATH SAID ELEVATOR PLATFORM, A PAIR OF BEARING BLOCKS THREADED OVER SAID JACKSCREW, PIVOTED LINKS JOINING SAID BEARING BLOCKS TO SAID ELEVATOR PLATFROM AND SAID BOTTOM FRAME, AND MEANS FOR SELECTIVELY ROTATING SAID JACKSCREW IN OPPOSITE DIRECTIONS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |