US3272764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing cellular polymeric products
Assignee: Honeywell International Inc
•
Filing: 1963-02-21
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Granted: 1966-09-13
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Max B Mueller
- 👤 Largman Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:11
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR MAKING PLASTIC FOAM WHICH COMPRISES HEATING A NORMALLY SOLID, THERMOPLASTIC MACROMOLECULAR POLYMERIC MATERIAL HAVING A DECOMPOSITION TEMPERATURE ABOVE ABOUT 200*C. AND A SOFTENING TEMPERATURE BELOW ABOUT 150*C. IN THE PRESENCE OF A SMALL PROPORTION OF A BETA PROPIOLACTONE OF THE FORMULA
Claim 2
Dependent Claim
44 words
A PROCESS FOR MAKING PLASTIC FOAM WHICH COMPRISES HEATING A NORMALLY SOLID, THERMOPLASTIC MACROMOLECULAR POLYMERIC MATERIAL HAVING A DECOMPOSITION TEMPERATURE ABOVE ABOUT 200*C. AND A SOFTENING TEMPERATURE BELOW ABOUT 150*C. IN THE PRESENCE OF A SMALL PROPORTION OF A BETA PROPIOLACTONE OF THE FORMULA
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |