US3248254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically and physically unified sheet materials
Assignee: 3M Co
•
Filing: 1962-01-31
•
Granted: 1966-04-26
•
Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 Robert E Zenk
- 👤 William E Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:43
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/28; C08G18/40; C08G18/64; C08G18/6484; C08L; C08L75/00; C08L75/04; C09; C09J; C09J175/00; C09J175/04; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; D21H17/46; D21H17/54; D21H17/57; H; H03; H03L; H03L7/00; H03L7/26; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/31504; Y10T428/31551; Y10T428/31591; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A CHEMICALLY AND PHYSICALLY UNIFIED AND INTERBONDED SHEET MATERIAL COMPRISING A FIBROUS CELLULOSIC SHEET SATURATED AND REACTED WITH THE IN SITU-CURED POLYURETHAE REACTION PRODUCT OF A SECONDARY HYDROXYL-TERMINATED POLYALKYLENE ETHER POLYOL AND A POLYISOCYANATE PRESENT IN SUFFICIENT AMOUNT TO PROVIDE AT LEAST ABOUT ONE NCO GROUP FOR EACH OH GROUP OF SAID POLYEHTER, SAID REACTION BEING CARRIED OUT IN THE PRESENCE OF A CATALYTIC AMOUNT OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LEAD OCTOATE, BISMUTH NAPHTHENATE, PHENYL MERCURIC ACETATE, AND PHENYL MERCURIC OLEATE.
Claim 2
Dependent Claim
85 words
A CHEMICALLY AND PHYSICALLY UNIFIED AND INTERBONDED SHEET MATERIAL COMPRISING A FIBROUS CELLULOSIC SHEET SATURATED AND REACTED WITH THE IN SITU-CURED POLYURETHAE REACTION PRODUCT OF A SECONDARY HYDROXYL-TERMINATED POLYALKYLENE ETHER POLYOL AND A POLYISOCYANATE PRESENT IN SUFFICIENT AMOUNT TO PROVIDE AT LEAST ABOUT ONE NCO GROUP FOR EACH OH GROUP OF SAID POLYEHTER, SAID REACTION BEING CARRIED OUT IN THE PRESENCE OF A CATALYTIC AMOUNT OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LEAD OCTOATE, BISMUTH NAPHTHENATE, PHENYL MERCURIC ACETATE, AND PHENYL MERCURIC OLEATE.
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |