Patent US3030406A successfully refreshed from Google Patents.
Patent US2174534A successfully refreshed from Google Patents.
US2174534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: EIDP Inc
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Filing: 1936-04-22
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Granted: 1939-10-03
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Expires: 1956-04-22
Abstract
No abstract record available.
Inventors
- 👤 Shipp Joseph Harrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:45
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; D06M11/00; D06M11/51; D06M11/55; D06M11/58; D06M11/59; D06M11/60
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) | 1942-10-02 | 1943-04-03 | 1943-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-02 | 1947-04-03 | 1947-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-02 | 1951-04-03 | 1951-10-03 | $7700.00 | Window Closed / Lapsed |