Patent US1243377A successfully refreshed from Google Patents.
US1243377A
Expired / Lapsed
US
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Means for minimizing the effects of colliery explosions.
Assignee: Individual
•
Filing: 1914-12-26
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Granted: 1917-10-16
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Expires: 1934-12-26
Abstract
No abstract record available.
Inventors
- 👤 John Joseph Collinson Allison
- 👤 John Waller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:57
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; E; E21; E21F; E21F1/00; E21F1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-10-15 | 1921-04-16 | 1921-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-10-15 | 1925-04-16 | 1925-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-10-15 | 1929-04-16 | 1929-10-16 | $7700.00 | Window Closed / Lapsed |