Patent US3493343A successfully refreshed from Google Patents.
US3493343A
Expired / Lapsed
US
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Production of hydrogen peroxide
Assignee: Evonik LCL Ltd
•
Filing: 1966-11-22
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Granted: 1970-02-03
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Expires: 1986-11-22
Abstract
No abstract record available.
Inventors
- 👤 William R Logan
- 👤 John E Braid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; B01J31/16; B01J31/165; C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/643; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/821; B01J2531/822; B01J2531/824; B01J2531/825; B01J2531/827; B01J2531/828; Y; Y10; Y10S; Y10S502/00; Y10S502/50; Y10S502/504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2852474A
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US2861045A
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US2857337A
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US3150930A
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US3361533A
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US3288725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |