US3535285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
After-condensation of polycondensation polymers in an electrical high frequency field
Assignee: Hoechst AG
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Filing: 1968-02-14
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Granted: 1970-10-20
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Expires: 1988-02-14
Abstract
No abstract record available.
Inventors
- 👤 Robert Breiner
- 👤 Hans Thaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:33
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/80; C08G69/00; C08G69/02; C08G69/04; C08G69/06; C08J; C08J3/00; C08J3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB614625A
Cited
US2640142A
Cited
US2585970A
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US2738406A
Cited
US3232810A
Cited
US3342782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |