Patent US3226426A successfully refreshed from Google Patents.
US3226426A
Expired / Lapsed
US
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4-hydroxy-2-butynyl carbamates
Assignee: Gulf Oil Corp
•
Filing: 1962-06-05
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Granted: 1965-12-28
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Expires: 1982-06-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Hopkins
- 👤 Paul D Strickler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:53
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/75; C07D223/00; C07D223/02; C07D223/06; C07D223/12; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/44; C07D277/48; C07D277/60; C07D277/62; C07D277/68; C07D277/82; C07D295/00; C07D295/16; C07D295/20; C07D295/205; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/52; C09; C09B; C09B43/00; C09B43/12; C09B43/124; C09B43/1245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2788268A
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |