Patent US3430261A successfully refreshed from Google Patents.
US3430261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound attenuator attachment for a protective helmet
Assignee: Airco Inc
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Filing: 1967-03-01
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Granted: 1969-03-04
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Expires: 1987-03-01
Abstract
No abstract record available.
Inventors
- 👤 Charles E Benner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:54
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729051A
Cited
US2631286A
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US2855604A
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US2904790A
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US2963708A
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US2915756A
Cited
US3193841A
Cited
US3273164A
Cited
US3332086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |