US3830874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy-amine adhesives of superior toughness
Assignee: Wyeth Holdings LLC
•
Filing: 1973-07-05
•
Granted: 1974-08-20
•
Expires: 1993-07-05
Abstract
Abstract THERMOSETTING EPOXY-AMINE ADHESIVE COMPOSTIONS WHICH HAVE A UNIFORMLY DISTRIBUTED CONTENT OF A WATERINSOLUBLE RUBBER POLYMER AT LEAST 10 MOL PERCENT COMPOSED OF EPICHLOROHYDRIN LINKAGES AND HAVING A MOLECULAR WEIGHT OF AT LEAST 100,000 POSSESS IMPROVED TOUGHNESS. THESE COMPOSTIONS FIND USE IN THE MANUFACTURE OF AIRCRAFT WING AND FUSELAGE SECTIONS.
Inventors
- 👤 J Vasil
- 👤 J Bursel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:35
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/02; C08L71/03; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/38; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; C09; C09J; C09J163/00; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/22; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T442/00; Y10T442/20; Y10T442/2738
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |