Patent US3414622A successfully refreshed from Google Patents.
US3414622A
Expired / Lapsed
US
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Production of hexamethylenediamine
Assignee: El Paso Products Co
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Filing: 1965-10-26
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Granted: 1968-12-03
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Expires: 1985-10-26
Abstract
No abstract record available.
Inventors
- 👤 William B Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:49
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/44; C12P19/60; C12P19/62; C07; C07C; C07C17/00; C07C17/07; C07C17/08; C07C17/093; C07C17/15; C07C17/152; C07C17/154; C07C2/00; C07C2/86; C07C2/861; C07C209/00; C07C209/04; C07C209/06; C07C209/08; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |