Patent US2664432A successfully refreshed from Google Patents.
US2664432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic metal and sulfur organic compounds
Assignee: Individual
•
Filing: 1951-09-19
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Granted: 1953-12-29
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Expires: 1971-09-19
Abstract
No abstract record available.
Inventors
- 👤 Ernst A H Friedheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:39
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/66; C07F9/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A NEW ORGANOMETALLIC DITHIO DERIVATIVE OF AN AMINO-PHENYL-ARSENIC COMPOUND CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
14 words
A NEW ORGANOMETALLIC DITHIO DERIVATIVE OF AN AMINO-PHENYL-ARSENIC COMPOUND CORRESPONDING TO THE GENERAL FORMULA
References Cited (Backward Citations)
US1677392A
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US2035153A
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US2209876A
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US2330963A
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US2283817A
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US2422724A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |