Patent US4086048A successfully refreshed from Google Patents.
Patent US1398246A successfully refreshed from Google Patents.
US1398246A
Expired / Lapsed
US
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Apparatus for supplying air to the exterior of hulls of ships
Assignee: Individual
•
Filing: 1919-05-27
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Granted: 1921-11-29
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Expires: 1939-05-27
Abstract
No abstract record available.
Inventors
- 👤 F G Trask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; B63B2001/387; Y; Y02; Y02T; Y02T70/00; Y02T70/10
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) | 1924-11-28 | 1925-05-30 | 1925-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-11-28 | 1929-05-30 | 1929-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-11-28 | 1933-05-30 | 1933-11-29 | $7700.00 | Window Closed / Lapsed |