US2858828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirator
Assignee: Exide Technologies LLC
•
Filing: 1954-05-18
•
Granted: 1958-11-04
•
Expires: 1974-05-18
Abstract
No abstract record available.
Inventors
- 👤 James N Matheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02; A62B18/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718350A
Cited
US1352818A
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FR717430A
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US2051023A
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US2238492A
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US2382364A
Cited
US2370451A
Cited
US2467364A
Cited
GB653583A
Cited
US2706983A
Cited
US2684066A
Cited
US2818861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |