Patent US3535569A successfully refreshed from Google Patents.
US3535569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure support resonator mounting
Assignee: Duracell Inc USA
•
Filing: 1968-04-19
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Granted: 1970-10-20
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Expires: 1988-04-19
Abstract
No abstract record available.
Inventors
- 👤 Charles Dale Clawson
- 👤 Arthur Harley Clawson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:19
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0533; H03H9/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3046423A
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US3054915A
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US3423700A
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US3221189A
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US3403358A
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US3340410A
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US3370188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |