US2787481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transition pipe coupling
Assignee: Hydrocarbon Research Inc
•
Filing: 1952-08-20
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Granted: 1957-04-02
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Expires: 1972-08-20
Abstract
No abstract record available.
Inventors
- 👤 Herman F Buschow
- 👤 Leo J Van Orden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:44
CPC Classifications
F; F16; F16L; F16L39/00; F16L13/00; F16L13/007; Y; Y10; Y10S; Y10S29/00; Y10S29/035; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49938; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12396; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1329479A
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US1693838A
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US1736610A
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US1678640A
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US1703037A
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US1678343A
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US1776615A
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DE585377C
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FR816069A
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US2209181A
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US2230115A
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US2375574A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |