US3215675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonyl polymers of dialdehydes and processes for preparing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1962-07-10
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Granted: 1965-11-02
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 Jerry N Koral
- 👤 Howard R Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:35
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A STABLE, FUSIBLE POLYMER OF A DIALDEHYDE COMPOSED SOLELY OF RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
24 words
A PROCESS FOR THE CARBONYL POLYMERIZATION OF A DIALDEHYDE WHICH COMPRISES CONTACTING A MONOMER COMPOSITION CONSISTING OF AT LEAST ONE COMPOUND HAVING THE FORMULA
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |