US3537115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hanger element for supporting a spring frame
Assignee: Hickory Springs Manufacturing Co
•
Filing: 1968-07-23
•
Granted: 1970-11-03
•
Expires: 1988-07-23
Abstract
No abstract record available.
Inventors
- 👤 Samuel E Gordin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:06
CPC Classifications
A; A47; A47D; A47D7/00; A47D7/01; A47D7/03; A47D9/00; A47D9/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2895144A
Cited
US2242307A
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US2297963A
Cited
US2447722A
Cited
US2630582A
Cited
US2641772A
Cited
US2835314A
Cited
US3129439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |