US3409709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fill point determination
Assignee: Dow Chemical Co
•
Filing: 1964-07-23
•
Granted: 1968-11-05
•
Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Cleereman
- 👤 Walter J Schrenk
- 👤 Paul C Woodland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:20
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/0003; B23; B23Q; B23Q15/00; B29C45/00; B29C45/17; B29C45/46; B29C45/56; B29C45/5605; B29C45/76; B29C45/7613
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2372177A
Cited
US3062999A
Cited
US2786234A
Cited
US2928037A
Cited
US3025568A
Cited
US3133239A
Cited
FR1288393A
Cited
US3178901A
Cited
US3246210A
Cited
US3307726A
Cited
US3306964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |