US1776786A
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Assignee: DURO CO
•
Filing: 1929-04-11
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Granted: 1930-09-30
•
Expires: 1949-04-11
Abstract
No abstract record available.
Inventors
- 👤 Charles P Eisenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:09
CPC Classifications
F; F04; F04B; F04B23/00; F04B23/02; F04B23/025; F04B23/028; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B1/126; F04B1/14; F04B1/18; F04B11/00; F04B11/0091; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/127; F04B53/128; F04B53/16; F04B53/162; F04B53/164; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86091
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) | 1933-09-29 | 1934-03-31 | 1934-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-09-29 | 1938-03-31 | 1938-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-09-29 | 1942-03-31 | 1942-09-30 | $7700.00 | Window Closed / Lapsed |