Patent US3429072A successfully refreshed from Google Patents.
US3429072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coiled spring assemblies
Assignee: Individual
•
Filing: 1967-07-14
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Granted: 1969-02-25
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Expires: 1987-07-14
Abstract
No abstract record available.
Inventors
- 👤 Douglas Charles Sammons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:30
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1207; E05D13/1223; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1041; E05F1/1066; E05F1/1075; E05D13/1215; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US803427A
Cited
US2012336A
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US1983856A
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US2139383A
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US2708525A
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US2926727A
Cited
US2985446A
Cited
US2953928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |