US3498886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash distillation partitioned tower
Assignee: VWS Westgarth Ltd
•
Filing: 1966-04-05
•
Granted: 1970-03-03
•
Expires: 1986-04-05
Abstract
No abstract record available.
Inventors
- 👤 Peter Thomas Walker
- 👤 Ivan Henry Newson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:41
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/10; B; B01; B01D; B01D1/00; B01D1/14; B01D3/00; B01D3/06; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S159/00; Y10S159/33; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2976224A
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US3057786A
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US3165452A
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US3181600A
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US3232847A
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US3236747A
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US3298932A
Cited
US3219554A
Cited
US3312601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |