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US1437686A
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Assignee: Individual
•
Filing: 1921-05-28
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Granted: 1922-12-05
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Expires: 1941-05-28
Abstract
No abstract record available.
Inventors
- 👤 Charles H Selin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:24
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/02; F04F; F04F1/00; F04F1/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87153; Y10T137/87161
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) | 1925-12-04 | 1926-06-05 | 1926-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-04 | 1930-06-05 | 1930-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-04 | 1934-06-05 | 1934-12-05 | $7700.00 | Window Closed / Lapsed |