Patent US3538191A successfully refreshed from Google Patents.
US3538191A
Expired / Lapsed
US
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Process for preparing improved plastic compositions and the resulting products
Assignee: DSM Copolymer Inc
•
Filing: 1967-03-30
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Granted: 1970-11-03
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Expires: 1987-03-30
Abstract
No abstract record available.
Inventors
- 👤 Curtis L Meredith
- 👤 Robert E Barrett
- 👤 William A Bishop Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/18; C08L33/20; C08F; C08F255/00; C08F255/02; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L33/02; C08L33/04; C08L33/06; C08L33/24; C08L33/26; C08L51/00; C08L51/06; C08L57/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3151173A
Cited
US3489822A
Cited
GB1009719A
Cited
US3311675A
Cited
US3271477A
Cited
US3432577A
Cited
US3449471A
Cited
US3435096A
Cited
US3483273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |