US2607759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salts of hexamethylenetetraminium bases as latent curing catalysts
Assignee: Akzo Nobel UK PLC
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Filing: 1949-06-17
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Granted: 1952-08-19
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Expires: 1969-06-17
Abstract
No abstract record available.
Inventors
- 👤 John A Yourtee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:23
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/12; C07D487/18; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0239
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
AS A NEW COMPOSITION OF MATTER, A SUBSTANTIALLY DRY AND NEUTRAL MOLDING COMPOSITION COMPRISING AN ACID-CURING THERMOSETTING RESIN AND A LATENT CURING CATALYST WHICH IS ACID-CURING AT TEMPERATURES IN THE RANGE OF 135* TO 165* C., SAID CATALYST BEING A SALT OF A HEXAMETHYLENETETRAMINIUM BASE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
GB160258A
Cited
US2059609A
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US2156124A
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US2326725A
Cited
US2322566A
Cited
US2331862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |