Patent US3426940A successfully refreshed from Google Patents.
US3426940A
Expired / Lapsed
US
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Pressure vessels
Assignee: Phillips Petroleum Co
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Filing: 1966-11-21
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Granted: 1969-02-11
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Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Broerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:31
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/24; B29C49/0005; B29C70/00; B29C70/04; B29C70/28; B29C2049/2404; B29C2049/2414; B29C2049/24302; B29C2049/24306; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2077/00; B29L; B29L2028/00; B29L2031/00; B29L2031/712; B29L2031/7154; B29L2031/7156
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2594235A
Cited
US2744043A
Cited
US2825721A
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US3078007A
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US3113831A
Cited
US3214320A
Cited
US3305911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |