Patent US3069830A successfully refreshed from Google Patents.
US3069830A
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US
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Heatless fractionator
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-03-24
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Granted: 1962-12-25
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Expires: 1980-03-24
Abstract
No abstract record available.
Inventors
- 👤 Charles W Skarstrom
- 👤 William O Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:45
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D2253/00; B01D2253/10; B01D2253/104; B01D2253/106; B01D2253/108; B01D2253/30; B01D2253/302; B01D2253/308; B01D2256/00; B01D2256/12; B01D2257/00; B01D2257/10; B01D2257/102; B01D2257/50; B01D2257/504; B01D2257/70; B01D2257/702; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40043; B01D2259/4005; B01D2259/40052; B01D2259/40077; B01D2259/40081; B01D2259/402; B01D53/0473; B01D53/26; B01D53/261; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759812A
Cited
US1548280A
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US1617305A
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US2612512A
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US2709496A
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US2877861A
Cited
US2944627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |