US3159700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexibilizing rigid foams
Assignee: Dow Chemical Co
•
Filing: 1962-05-31
•
Granted: 1964-12-01
•
Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Nakamura Masao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; Y; Y10; Y10S; Y10S264/00; Y10S264/04; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD OF FLEXIBILIZING A RIGID CELLULAR RESINOUS SHEET COMPRISING PARTIALLY CRUSHING SAID SHEET BY APPLYING A FORCE TO SAID SHEET IN A DIRECTION LYING IN THE PLANE OF THE SHEET.
Claim 2
Independent Claim
31 words
A METHOD OF FLEXIBILIZING A RIGID CELLULAR RESINOUS SHEET COMPRISING PARTIALLY CRUSHING SAID SHEET BY APPLYING A FORCE TO SAID SHEET IN A DIRECTION LYING IN THE PLANE OF THE SHEET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |