US2813700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Even distribution header system
Assignee: RTX Corp
•
Filing: 1954-08-20
•
Granted: 1957-11-19
•
Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Hilbert Van Nydeck Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:31
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/026; F28F9/027; F28F9/0275; F22; F22D; F22D1/00; F22D1/02; F28D; F28D7/00; F28D7/0041; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87249; Y10T137/87265; Y10T137/87281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE158769C
Cited
US2093825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |