US3493031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefinisher for polymeric material
Assignee: Monsanto Co
•
Filing: 1968-02-21
•
Granted: 1970-02-03
•
Expires: 1988-02-21
Abstract
No abstract record available.
Inventors
- 👤 Louis B Williams Jr
- 👤 Paul M Heitmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/765; B29C48/766; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/428; B29B7/429; B29B7/80; B29B7/82; B29B7/826; B29B7/84; B29B7/845; B29B7/823; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2378539A
Cited
US2626856A
Cited
US2833750A
Cited
US3067812A
Cited
US3253892A
Cited
US3361537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |