Patent US2665260A successfully refreshed from Google Patents.
US2665260A
Expired / Lapsed
US
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Preparation of infusible resins of superior toughness and flexibility from a ketodiguanamine and formaldehyde
Assignee: Honeywell International Inc
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Filing: 1951-11-05
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Granted: 1954-01-05
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Expires: 1971-11-05
Abstract
No abstract record available.
Inventors
- 👤 Simons John Kenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:13
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
14 words
A THERMOSETTING INTERMEDIATE REACTION PRODUCT OF FORMALDEHYDE WITH A SUBSTANCE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
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US2423353A
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US2425287A
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US2427315A
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US2427316A
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US2197357A
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US2217667A
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US2339622A
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US2396894A
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US2328963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |