US2257461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium perborate product
Assignee: EIDP Inc
•
Filing: 1940-03-23
•
Granted: 1941-09-30
•
Expires: 1960-03-23
Abstract
No abstract record available.
Inventors
- 👤 Harvey N Gilbert
- 👤 Norval D Clare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/12; C01B15/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-29 | 1945-03-31 | 1945-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-29 | 1949-03-31 | 1949-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-29 | 1953-03-31 | 1953-09-30 | $7700.00 | Window Closed / Lapsed |