US3492289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of alkylenimines
Assignee: Dow Chemical Co
•
Filing: 1966-06-13
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Granted: 1970-01-27
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Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Richard H Symm
- 👤 George E Ham
- 👤 Clarence R Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:32
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C07D203/12; C08L; C08L63/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR809414A
Cited
US3033746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |