US3285949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxyl-terminated butadiene polymers prepared in tertiary butanol with bis-azocyano acid initiation
Assignee: Goodrich Corp
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Filing: 1964-04-17
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Granted: 1966-11-15
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Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Alan R Siebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:57
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD OF PRODUCING POLYBUTADIENE HOMOPOLYMER HAVING FUNCTIONAL CARBOXYL TERMINATION AT EACH END OF THE POLYMER CHAIN WHICH COMPRISES SOLVENT POLYMERIZING BUTADIENE MONOMER USING AS AN INITIATOR AN ALIPHATIC AZODICARBOXYLATE IN WHICH THE CARBONS ATTACHED TO THE AZO GROUP ARE TERTIARY, REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
45 words
THE METHOD OF PRODUCING POLYBUTADIENE HOMOPOLYMER HAVING FUNCTIONAL CARBOXYL TERMINATION AT EACH END OF THE POLYMER CHAIN WHICH COMPRISES SOLVENT POLYMERIZING BUTADIENE MONOMER USING AS AN INITIATOR AN ALIPHATIC AZODICARBOXYLATE IN WHICH THE CARBONS ATTACHED TO THE AZO GROUP ARE TERTIARY, REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US2744105A
Cited
DE1150205B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |