Patent US3297655A successfully refreshed from Google Patents.
US3297655A
Expired / Lapsed
US
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Piperidino-polycarbonamides
Assignee: Individual
•
Filing: 1965-05-10
•
Granted: 1967-01-10
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Francis E Cislak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:48
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; Y; Y10; Y10T; Y10T152/00; Y10T152/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
PIPERIDINO-POLYCARBONAMIDES OF A BIS-CARBOXYPIPERIDIDE HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
PIPERIDINO-POLYCARBONAMIDES OF A BIS-CARBOXYPIPERIDIDE HAVING THE FORMULA
References Cited (Backward Citations)
US3197442A
Cited
US3210359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |