Patent US1820229A successfully refreshed from Google Patents.
US1820229A
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US
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Assignee: Individual
•
Filing: 1926-08-26
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Granted: 1931-08-25
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Expires: 1946-08-26
Abstract
No abstract record available.
Inventors
- 👤 Clarence C Korns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:17
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/24; F16B; F16B2/00; F16B2/02; F16B2/06; F16B2/10; F16B7/00; F16B7/04; F16B7/044; F16B7/048; F16B7/0493; Y; Y10; Y10T; Y10T403/00; Y10T403/46; Y10T403/71; Y10T403/7105
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) | 1934-08-24 | 1935-02-23 | 1935-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-24 | 1939-02-23 | 1939-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-24 | 1943-02-23 | 1943-08-25 | $7700.00 | Window Closed / Lapsed |