US3487132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of porous plastic materials by means of dielectric heating
Assignee: Individual
•
Filing: 1968-04-19
•
Granted: 1969-12-30
•
Expires: 1988-04-19
Abstract
No abstract record available.
Inventors
- 👤 Burt Thorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/24; B; B29; B29C; B29C67/00; B29C67/20; B29C67/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2364790A
Cited
GB607690A
Cited
US2459225A
Cited
US2617752A
Cited
US2602133A
Cited
GB750239A
Cited
US2966469A
Cited
US3010157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |