Patent US3308487A successfully refreshed from Google Patents.
US3308487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame element for supporting sinuous spring strips
Assignee: —
•
Filing: —
•
Granted: 1967-03-14
•
Expires: 1984-03-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:17
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN COMBINATION, A PLURALITY OF SINUOUS SPRING STRIPS, A FRAME ELEMENT FOR SUPPORTING THE ENDS OF SAID SINUOUS SPRING STRIPS, SAID ELEMENT HAVING A WEB AND A FLANGE PORTION EXTENDING THEREFROM, AND SECTIONS LANCED IN AN ADJACENT WEB AND FLANGE PORTION WHICH ARE PUSHED OUTWARDLY TO FORM ELONGATED TUNNELS BETWEEN THE WEB AND FLANGE PORTION, THE ENDS OF SAID SINUOUS SPRING STRIPS BEING DISPOSED IN SAID TUNNELS.
Claim 2
Dependent Claim
67 words
IN COMBINATION, A PLURALITY OF SINUOUS SPRING STRIPS, A FRAME ELEMENT FOR SUPPORTING THE ENDS OF SAID SINUOUS SPRING STRIPS, SAID ELEMENT HAVING A WEB AND A FLANGE PORTION EXTENDING THEREFROM, AND SECTIONS LANCED IN AN ADJACENT WEB AND FLANGE PORTION WHICH ARE PUSHED OUTWARDLY TO FORM ELONGATED TUNNELS BETWEEN THE WEB AND FLANGE PORTION, THE ENDS OF SAID SINUOUS SPRING STRIPS BEING DISPOSED IN SAID TUNNELS.
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |