US3408690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making foamed polymeric structures
Assignee: WR Grace and Co
•
Filing: 1966-12-07
•
Granted: 1968-11-05
•
Expires: 1986-12-07
Abstract
No abstract record available.
Inventors
- 👤 Francis J Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/206; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C44/3415; B29C44/3426
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2866730A
Cited
US3178768A
Cited
US3065500A
Cited
US3142864A
Cited
US3200437A
Cited
US3262151A
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 |