US3014479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirator
Assignee: Welsh Manufacturing Co
•
Filing: 1959-05-20
•
Granted: 1961-12-26
•
Expires: 1979-05-20
Abstract
No abstract record available.
Inventors
- 👤 James N Matheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:24
CPC Classifications
A; A62; A62B; A62B23/00; A62B23/02; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1107; A41D13/1138; A41D13/1146
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US681622A
Cited
US2142064A
Cited
US2111995A
Cited
US2290885A
Cited
US2888012A
Cited
US2845927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |