US3309412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing the polymerization of butadiene
Assignee: Japanese Geon Co Ltd
•
Filing: 1965-03-05
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Granted: 1967-03-14
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Expires: 1985-03-05
Abstract
No abstract record available.
Inventors
- 👤 Sakuragi Taketami
- 👤 Jyo Yoshio
- 👤 Asano Yoshinobu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:34
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A METHOD OF REDUCING THE TENDENCY OF BUTADIENE TO POLYMERIZE IN SOLUTIONS EXPOSED TO ELEVATED TEMPERATURES, OR ELEVATED TEMPERATURES AND IRON RUST, WHICH COMPRISES ADDING TO THE SOLUTION, AS A POLYMERIZATION INHIBITOR, FURFURAL IN AN AMOUNT OF 0.01 PERCENT TO 10 PERCENT BY WEIGHT BASED ON THE SOLVENT.
Claim 2
Independent Claim
48 words
A METHOD OF REDUCING THE TENDENCY OF BUTADIENE TO POLYMERIZE IN SOLUTIONS EXPOSED TO ELEVATED TEMPERATURES, OR ELEVATED TEMPERATURES AND IRON RUST, WHICH COMPRISES ADDING TO THE SOLUTION, AS A POLYMERIZATION INHIBITOR, FURFURAL IN AN AMOUNT OF 0.01 PERCENT TO 10 PERCENT BY WEIGHT BASED ON THE SOLVENT.
Claim 3
Independent Claim
51 words
A METHOD OF REDUCING THE TENDENCY OF BUTADIENE TO POLYMERIZE IN SOLUTIONS EXPOSED TO ELEVATED TEMPERATURES, OR ELEVATED TEMPERATURES AND IRON RUST, WHICH COMPRISES ADDING TO THE SOLUTION, AS A POLYMERIZATION INHIBITOR, AN AROMATIC NITRO COMPOUND IN AN AMOUNT OF 0.01 PERCENT TO 10 PERCENT BY WEIGHT BASED ON THE SOLVENT.
Claim 4
Independent Claim
51 words
A METHOD OF REDUCING THE TENDENCY OF BUTADIENE TO POLYMERIZE IN SOLUTIONS EXPOSED TO ELEVATED TEMPERATURES, OR ELEVATED TEMPERATURES AND IRON RUST, WHICH COMPRISES ADDING TO THE SOLUTION, AS A POLYMERIZATION INHIBITOR, AN AROMATIC NITRO COMPOUND IN AN AMOUNT OF 0.01 PERCENT TO 10 PERCENT BY WEIGHT BASED ON THE SOLVENT.
References Cited (Backward Citations)
US2478045A
Cited
US2730489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |