Patent US2981739A successfully refreshed from Google Patents.
US2981739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain alpha-haloaldehyde addition products of ethylenethioureas and process
Assignee: Diamond Shamrock Corp
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Filing: 1958-01-27
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Granted: 1961-04-25
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Expires: 1978-01-27
Abstract
No abstract record available.
Inventors
- 👤 Russell M Bimber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:52
CPC Classifications
C; C07; C07D; C07D409/00; C07D409/02; C07D409/04; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
References Cited (Backward Citations)
US2357149A
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US2621211A
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US2635115A
Cited
US2801200A
Cited
US2774706A
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US2726150A
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US2764478A
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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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |