Patent US3138804A successfully refreshed from Google Patents.
US3138804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual purpose sleep unit
Assignee: Individual
•
Filing: 1961-07-27
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Granted: 1964-06-30
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Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Bendell David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:40
CPC Classifications
A; A47; A47C; A47C17/00; A47C17/04; A47C17/13; A47C17/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A DUAL PURPOSE SLEEP UNIT COMPRISING A TRACK SUPPORT FRAME, A PAIR OF SUBSTANTIALLY PARALLEL AND SPACED TRACKS MOUNTED ON SAID FRAME, A MATTRESS SUPPORT FRAME, A PAIR FLOOR ENGAGING ROLLERS MOUNTED AT A FRONT PORTION OF SAID MATTRESS SUPPORT FRAME, A PAIR OF ROLLERS POSITIONED IN SAID TRACKS AND MOUNTED ON A REAR PORTION OF SAID MATTRESS SUPPORT FRAME FOR SLIDING MOVEMENT OF SAID MATTRESS SUPPORT FRAME ALONG SAID TRACK SUPPORT FRAME, A PAIR OF COIL SPRINGS SECURED AT ONE END TO SAID REAR PORTION OF SAID MATTRESS SUPPORT FRAME AND EXTENDING TO A FRONT PORTION OF SAID TRACK SUPPORT FRAME, SAID COIL SPRINGS YIELDINGLY URGING SAID MATTRESS SUPPORT FRAME TO SLIDE FORWARDLY ALONG SAID TRACKS OF SAID TRACK SUPPORT FRAME WHEN SAID MATTRESS SUPPORT FRAME IS IN ITS RETRACTED POSITION ON SAID TRACK SUPPORT FRAME AND YIELDINGLY BRAKING SAID MATTRESS SUPPORT FRAME IN ITS REARWARD SLIDING MOVEMENT TO ITS RETRACTED POSITION, LATCH MEANS RELEASABLY SECURING SAID MATTRESS SUPPORT FRAME AGAINST SAID FORWARD SLIDING MOVE-
Claim 2
Dependent Claim
166 words
A DUAL PURPOSE SLEEP UNIT COMPRISING A TRACK SUPPORT FRAME, A PAIR OF SUBSTANTIALLY PARALLEL AND SPACED TRACKS MOUNTED ON SAID FRAME, A MATTRESS SUPPORT FRAME, A PAIR FLOOR ENGAGING ROLLERS MOUNTED AT A FRONT PORTION OF SAID MATTRESS SUPPORT FRAME, A PAIR OF ROLLERS POSITIONED IN SAID TRACKS AND MOUNTED ON A REAR PORTION OF SAID MATTRESS SUPPORT FRAME FOR SLIDING MOVEMENT OF SAID MATTRESS SUPPORT FRAME ALONG SAID TRACK SUPPORT FRAME, A PAIR OF COIL SPRINGS SECURED AT ONE END TO SAID REAR PORTION OF SAID MATTRESS SUPPORT FRAME AND EXTENDING TO A FRONT PORTION OF SAID TRACK SUPPORT FRAME, SAID COIL SPRINGS YIELDINGLY URGING SAID MATTRESS SUPPORT FRAME TO SLIDE FORWARDLY ALONG SAID TRACKS OF SAID TRACK SUPPORT FRAME WHEN SAID MATTRESS SUPPORT FRAME IS IN ITS RETRACTED POSITION ON SAID TRACK SUPPORT FRAME AND YIELDINGLY BRAKING SAID MATTRESS SUPPORT FRAME IN ITS REARWARD SLIDING MOVEMENT TO ITS RETRACTED POSITION, LATCH MEANS RELEASABLY SECURING SAID MATTRESS SUPPORT FRAME AGAINST SAID FORWARD SLIDING MOVE-
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |