Patent US3223654A successfully refreshed from Google Patents.
US3223654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin foams and method of making same
Assignee: De Bell and Richardson Inc
•
Filing: 1959-06-19
•
Granted: 1965-12-14
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Mortimer H Nickerson
- 👤 Herbert S Schnitzer
- 👤 Curtis John Eliot
- 👤 George D Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08J2363/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
METHOD OF PRODUCING A RIGID THERMOSET FOAM ESSENTIALLY ISOTROPIC FROM A RESIN HAVING AT LEAST TWO
Claim 2
Dependent Claim
16 words
METHOD OF PRODUCING A RIGID THERMOSET FOAM ESSENTIALLY ISOTROPIC FROM A RESIN HAVING AT LEAST TWO
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |