Patent US2912978A successfully refreshed from Google Patents.
US2912978A
Expired / Lapsed
US
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Self oriented mask harness arrangement
Assignee: Individual
•
Filing: 1957-08-08
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Granted: 1959-11-17
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Henry W Seeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:54
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE727907C
Cited
US2423631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |