Patent US3376113A successfully refreshed from Google Patents.
US3376113A
Expired / Lapsed
US
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Catalytic hydrolysis of phosgene
Assignee: Dow Chemical Co
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Filing: 1965-05-13
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Granted: 1968-04-02
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Expires: 1985-05-13
Abstract
No abstract record available.
Inventors
- 👤 Ludo K Frevel
- 👤 Leonard J Kressley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:51
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; B01D53/70; C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2149039A
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US2444289A
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US2786816A
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US2773898A
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US2832670A
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US3058800A
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US3142535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |