US3016580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for forming rigid composite structures
Assignee: Eaton Corp
•
Filing: 1958-03-24
•
Granted: 1962-01-16
•
Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Jaeschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4223; Y; Y10; Y10S; Y10S264/00; Y10S264/58; Y10S425/00; Y10S425/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF MAKING A RIGID COMPOSITE STRUCTURE WHICH NORMALLY OPERATES AT RELATIVELY HIGH TEMPERATURES, COMPRISING FLOWING A HEAT HARDENABLE RESIN COMPOSITION INTO A CAVITY FORMED BY ABUTTING AT LEAST TWO SEPARATE STRUCTURAL MEMBERS, SAID RESIN COMPOSITION COMPRISING A HOMOGENOUS SUSPENSION OF A LIQUID EPOXY RESIN AND A SINGLE CURING AGENT CONSISTING OF PYROMELLITIC DIANHYDRIDE, AND A FINELY DIVIDED INORGANIC FILLER, WHICH SUSPENSION HAS A POT LIFE OF UP RO APPROXIMATELY FIVE DAYS, AND HEATING SAID SUSPENSION TO A TEMPERATURE OF BETWEEN APPROXIMATELY 225*F. TO 250*F. FOR ABOUT THREE HOURS THEREBY
Claim 2
Independent Claim
91 words
THE METHOD OF MAKING A RIGID COMPOSITE STRUCTURE WHICH NORMALLY OPERATES AT RELATIVELY HIGH TEMPERATURES, COMPRISING FLOWING A HEAT HARDENABLE RESIN COMPOSITION INTO A CAVITY FORMED BY ABUTTING AT LEAST TWO SEPARATE STRUCTURAL MEMBERS, SAID RESIN COMPOSITION COMPRISING A HOMOGENOUS SUSPENSION OF A LIQUID EPOXY RESIN AND A SINGLE CURING AGENT CONSISTING OF PYROMELLITIC DIANHYDRIDE, AND A FINELY DIVIDED INORGANIC FILLER, WHICH SUSPENSION HAS A POT LIFE OF UP RO APPROXIMATELY FIVE DAYS, AND HEATING SAID SUSPENSION TO A TEMPERATURE OF BETWEEN APPROXIMATELY 225*F. TO 250*F. FOR ABOUT THREE HOURS THEREBY
References Cited (Backward Citations)
US1781074A
Cited
US2324483A
Cited
US2690819A
Cited
US2751665A
Cited
US2765878A
Cited
US2745924A
Cited
US2818517A
Cited
US2768153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |