US3054777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyureas
Assignee: Toyo Koatsu Industries Inc
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Filing: 1959-05-12
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Granted: 1962-09-18
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Expires: 1979-05-12
Abstract
No abstract record available.
Inventors
- 👤 Inaba Yanosuke
- 👤 Miyake Kunihiko
- 👤 Kimura Goro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:21
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN IMPROVED METHOD FOR PREPARING LINEAR POLYUREAS COMPRISING A FIRST STEP WHEREIN A UREA COMPOUND SELECTED FROM THE CLASS CONSISTING OF UREA AND METHYLENE DIUREA AND A DIAMINE SELECTED FROM THE CLASS CONSISITING OF DIAMINES REPRESENTED BY THE FORMULAE
Claim 2
Dependent Claim
39 words
AN IMPROVED METHOD FOR PREPARING LINEAR POLYUREAS COMPRISING A FIRST STEP WHEREIN A UREA COMPOUND SELECTED FROM THE CLASS CONSISTING OF UREA AND METHYLENE DIUREA AND A DIAMINE SELECTED FROM THE CLASS CONSISITING OF DIAMINES REPRESENTED BY THE FORMULAE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |