US3306966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing compact expandable urethane foams
Assignee: Individual
•
Filing: 1963-04-08
•
Granted: 1967-02-28
•
Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Matejcek Franz
- 👤 Sponsel Kurt
- 👤 Pietsch Helmut
- 👤 Leupold Curt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:19
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; C08J2375/00; C08J2375/04; C08J2401/00; C08J2471/00; Y; Y10; Y10S; Y10S57/00; Y10S57/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
PROCESS FOR PREPARING COPACT, EXPANDABLE POLYURETHANE FOAMS WHICH COMPRISES IMPREGNATING SAID FOAM WITH A DEFATIGUING AGENT, COMPRESSING THE THUS IMPREGNATED FORM, APPLYING A FIXATING AGENT TO SAID COMPRESSED FOAM WHEREBY THE FOAM RETAINS COMPRESSED FORM
Claim 2
Dependent Claim
35 words
PROCESS FOR PREPARING COPACT, EXPANDABLE POLYURETHANE FOAMS WHICH COMPRISES IMPREGNATING SAID FOAM WITH A DEFATIGUING AGENT, COMPRESSING THE THUS IMPREGNATED FORM, APPLYING A FIXATING AGENT TO SAID COMPRESSED FOAM WHEREBY THE FOAM RETAINS COMPRESSED FORM
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |