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US3447162A
Expired / Lapsed
US
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Safety helmet with improved stabilizing and size adjusting means
Assignee: Gentex Corp
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Filing: 1967-02-06
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Granted: 1969-06-03
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Jackson A Aileo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:50
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/14; A42B3/145; Y; Y10; Y10S; Y10S2/00; Y10S2/908; Y10S2/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB449905A
Cited
US2371712A
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AT167156B
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US2898648A
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US2805419A
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US3082427A
Cited
US3031673A
Cited
US3241154A
Cited
US3289212A
Cited
US3344433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |