Patent US6520996B1 successfully refreshed from Google Patents.
US3377296A
Expired / Lapsed
US
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Flexible polyurethane foams
Assignee: Honeywell International Inc
•
Filing: 1962-11-13
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Granted: 1968-04-09
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Frank J Dwyer
- 👤 Stone Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4829; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0075; C08G2110/0083; C08J2375/00; C08J2375/04; C08J2375/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A FLEXIBLE URETHANE CELLULAR STRUCTURE CHARACTERIZED BY THE FOLLOWING PHYSICAL PROPERTIES:
Claim 2
Dependent Claim
11 words
A FLEXIBLE URETHANE CELLULAR STRUCTURE CHARACTERIZED BY THE FOLLOWING PHYSICAL PROPERTIES:
References Cited (Backward Citations)
US3067148A
Cited
US3050477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |