US2999498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirator
Assignee: Exide Technologies LLC
•
Filing: 1957-05-07
•
Granted: 1961-09-12
•
Expires: 1977-05-07
Abstract
No abstract record available.
Inventors
- 👤 James N Matheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02; A62B18/025; A62B18/08; A62B18/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/7898; Y10T137/7903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1310119A
Cited
US922262A
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US2036850A
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US2378613A
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US2738788A
Cited
US2818861A
Cited
US2744539A
Cited
US2744525A
Cited
US2745133A
Cited
US2858828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |