Patent US3262991A successfully refreshed from Google Patents.
US3262991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked reaction product of aziridinyl polyester resins with cyclic anhydrides
Assignee: Dow Chemical Co
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Filing: 1963-03-20
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Granted: 1966-07-26
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Expires: 1983-03-20
Abstract
No abstract record available.
Inventors
- 👤 Jack C Mcclendon
- 👤 Clarence R Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:18
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C08G63/918; C08G63/02; C08G63/12; C08G63/52; C08G63/66; C08G63/668; C08G63/676
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
THE PROCESS FOR MAKING A CROSS-LINKED RESIN COMPRISING (1) REACTING BY CONTACTING AN AZIRIDINE HAVING THE FORMULA
Claim 2
Dependent Claim
17 words
THE PROCESS FOR MAKING A CROSS-LINKED RESIN COMPRISING (1) REACTING BY CONTACTING AN AZIRIDINE HAVING THE FORMULA
Claim 3
Dependent Claim
16 words
THE PROCESS OF CLAIM 1 WHEREIN THE ANHYDRIDE IS A COPOLYMER OF STYRENE AND MALEIC ANHYDRIDE.
References Cited (Backward Citations)
US2988539A
Cited
US3107427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |