US3111503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal chelates as initiators for the polymerization of formaldehyde
Assignee: EIDP Inc
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Filing: 1961-04-06
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Granted: 1963-11-19
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Expires: 1981-04-06
Abstract
No abstract record available.
Inventors
- 👤 O'connor Timothy Edmond
- 👤 Hundred Brandywine
- 👤 Stamatoff Gelu Stoeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:14
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PREPARING HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE WHICH COMPRISES CONTACTING, AT A TEMPERATURE OF -110*C. TO 100*C., SUBSTANTIALLY ANHYDROUS MONOMERIC FORMALDEHYDE WITH A CATALYTIC AMOUNT OF A POLYMERIZATION INITIATOR WHICH IS A METAL CHELATE OF A SCHIFF''S BASE, SAID METAL BEING AN ELEMENT HAVING AN ATOMIC NUMBER FROM 22 TO 30 AND SAID SCHIFF''S BASE BEING THE CONDENSATION PRODUCT OF A PHENOLADLDEHYDE AND AN AMINE CONTAINING 1 TO 2 AMINO GROUPS AND BEING OTHERWISE UNSUBSTITUTED, AND RECOVERING HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR PREPARING HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE WHICH COMPRISES CONTACTING, AT A TEMPERATURE OF -110*C. TO 100*C., SUBSTANTIALLY ANHYDROUS MONOMERIC FORMALDEHYDE WITH A CATALYTIC AMOUNT OF A POLYMERIZATION INITIATOR WHICH IS A METAL CHELATE OF A SCHIFF''S BASE, SAID METAL BEING AN ELEMENT HAVING AN ATOMIC NUMBER FROM 22 TO 30 AND SAID SCHIFF''S BASE BEING THE CONDENSATION PRODUCT OF A PHENOLADLDEHYDE AND AN AMINE CONTAINING 1 TO 2 AMINO GROUPS AND BEING OTHERWISE UNSUBSTITUTED, AND RECOVERING HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE.
References Cited (Backward Citations)
US2848437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |