Patent US3313778A successfully refreshed from Google Patents.
US3313778A
Expired / Lapsed
US
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Sulfonic acid ester modified polyesters
Assignee: Teijin Ltd
•
Filing: 1961-03-28
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Granted: 1967-04-11
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Expires: 1981-03-28
Abstract
No abstract record available.
Inventors
- 👤 Sakurai Ryoichi
- 👤 Shima Takeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:53
CPC Classifications
C; C08; C08G; C08G64/00; C08G63/00; C08G63/02; C08G63/06; C08G75/00; C08G75/24; C08G63/78; C08G63/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB745412A
Cited
BE549179A
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US3018272A
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US2999846A
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US3004006A
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US3169944A
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US3185671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |