US3237203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attachment magnetically secured to a hard hat
Assignee: Individual
•
Filing: 1963-02-11
•
Granted: 1966-03-01
•
Expires: 1983-02-11
Abstract
No abstract record available.
Inventors
- 👤 Rasmus P Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:30
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/225; Y; Y10; Y10S; Y10S359/00; Y10S359/903; Y10S403/00; Y10S403/01; Y10T; Y10T24/00; Y10T24/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736027A
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US1198227A
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US2402431A
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US2597601A
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US2697642A
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US2788558A
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US2828131A
Cited
US2854241A
Cited
US2860343A
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US2881443A
Cited
US2926357A
Cited
US2962317A
Cited
US3067426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |