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US3137736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of formaldehyde solutions
Assignee: Celanese Corp
•
Filing: 1959-05-18
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Granted: 1964-06-16
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Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Roy H Prinz
- 👤 Bob C Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:29
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A SOLUTION OF 30 TO 80% OF FORMALDEHYDE IN WATER, SAID SOLUTION BEING STABILIZED BY A DISSOLVED ORGANIC COLLOID, SAID COLLOID BEING A HIGH POLYMER AND BEING PRESENT IN A STABILIZING AMOUNT UP TO ABOUT 1000 P.P.M.
Claim 2
Dependent Claim
37 words
A SOLUTION OF 30 TO 80% OF FORMALDEHYDE IN WATER, SAID SOLUTION BEING STABILIZED BY A DISSOLVED ORGANIC COLLOID, SAID COLLOID BEING A HIGH POLYMER AND BEING PRESENT IN A STABILIZING AMOUNT UP TO ABOUT 1000 P.P.M.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |