US3445441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-amido polymers
Assignee: Baker Petrolite LLC
•
Filing: 1965-03-25
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Granted: 1969-05-20
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Expires: 1985-03-25
Abstract
No abstract record available.
Inventors
- 👤 Brian M Rushton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08G; C08G69/00; Y; Y10; Y10S; Y10S507/00; Y10S507/903; Y10S507/921; Y10S507/939; Y10S526/00; Y10S526/923
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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |