Patent US3810174A successfully refreshed from Google Patents.
Patent US2521769A successfully refreshed from Google Patents.
US2521769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drier
Assignee: Individual
•
Filing: 1948-05-22
•
Granted: 1950-09-12
•
Expires: 1968-05-22
Abstract
No abstract record available.
Inventors
- 👤 Charles Du B Arcularius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:09
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806674A
Cited
US1578047A
Cited
US1686024A
Cited
US1760997A
Cited
US1961772A
Cited
US2278130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |