US3531321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnating coils,windings or insulating materials with diglycidyl-o-phthalate of high epoxide content and curing
Assignee: BASF Schweiz AG
•
Filing: 1968-04-02
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Granted: 1970-09-29
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Expires: 1988-04-02
Abstract
No abstract record available.
Inventors
- 👤 Hans Batzer
- 👤 Karl Metzger
- 👤 Ulrich Niklaus
- 👤 Alfred Heer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:12
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/16; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3053855A
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US3075999A
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US2895947A
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US2970971A
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US3073803A
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US3073804A
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US3071496A
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US3257345A
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US3060147A
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US3281492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |