US3352822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane elastomers stabilized with phenylthioureas and acid anhydrides
Assignee: Toyobo Co Ltd
•
Filing: 1965-02-23
•
Granted: 1967-11-14
•
Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Yamadera Reizo
- 👤 Ono Hiroshi
- 👤 Matsui Toshimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:28
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/36; C08K5/39; C08K5/405; D06M13/10; D06M13/184; D06M13/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A COMPOSITION WHICH COMPRISES (A) LINEAR POLYURETHANE ELASTOMER SUBJECT TO DISCOLORATION BY COMBUSTION GASES OR ULTRA-VIOLET LIGHT AND (B) A STABILIZING AMOUNT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) A PHENYLTHIOUREA OF THE FORMULA
Claim 2
Dependent Claim
39 words
A COMPOSITION WHICH COMPRISES (A) LINEAR POLYURETHANE ELASTOMER SUBJECT TO DISCOLORATION BY COMBUSTION GASES OR ULTRA-VIOLET LIGHT AND (B) A STABILIZING AMOUNT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) A PHENYLTHIOUREA OF THE FORMULA
References Cited (Backward Citations)
US3124543A
Cited
US3179625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |