Patent US3073785A successfully refreshed from Google Patents.
US3073785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive polymeric
Assignee: —
•
Filing: 1959-07-02
•
Granted: 1963-01-15
•
Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:53
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G73/1007; C08G73/1028; C08K; C08K5/00; C08K5/0091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS WHICH COMPRISES REACTING AT LEAST ONE DIAMINE HAVING THE STRUCTURAL FORMULA: SP @ H2N-R'' -NH2 SP @ WHEREIN R'' IS A DIVALENT RADICAL CONTAINING AT LEAST TWO CARBON ATOMS, WITH AT LEAST ONE TETRACARBOXYLIC ACID DIANHYDRIDE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
42 words
A PROCESS WHICH COMPRISES REACTING AT LEAST ONE DIAMINE HAVING THE STRUCTURAL FORMULA: SP @ H2N-R'' -NH2 SP @ WHEREIN R'' IS A DIVALENT RADICAL CONTAINING AT LEAST TWO CARBON ATOMS, WITH AT LEAST ONE TETRACARBOXYLIC ACID DIANHYDRIDE HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
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US2864774A
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US2710853A
Cited
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US2880230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |