Patent US3303219A successfully refreshed from Google Patents.
US3303219A
Expired / Lapsed
US
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Amines
Assignee: Sinclair Research Inc
•
Filing: 1965-03-10
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Granted: 1967-02-07
•
Expires: 1985-03-10
Abstract
No abstract record available.
Inventors
- 👤 Willis C Keith
- 👤 Robert P Zmitrovis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:39
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
AMINES OF THE FORMULA:
Claim 2
Dependent Claim
4 words
AMINES OF THE FORMULA:
References Cited (Backward Citations)
US2172822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |