Patent US2408694A successfully refreshed from Google Patents.
US2408694A
Expired / Lapsed
US
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Method of preparing acyl guanidines
Assignee: Libbey Owens Ford Glass Co
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Filing: 1942-05-29
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Granted: 1946-10-01
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Expires: 1962-05-29
Abstract
No abstract record available.
Inventors
- 👤 Simons John Kenson
- 👤 Welcome I Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:38
CPC Classifications
C; C07; C07C; C07C279/00; C07C279/04; C07C279/14
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) | 1949-09-30 | 1950-04-01 | 1950-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-30 | 1954-04-01 | 1954-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-30 | 1958-04-01 | 1958-10-01 | $7700.00 | Window Closed / Lapsed |