US3314834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pot life extension for polyurethane propellants
Assignee: RTX Corp
•
Filing: 1962-12-14
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Granted: 1967-04-18
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Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Walden
- 👤 Jack K West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:41
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008; C06B21/0025; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
IN THE PROCESS OF MAKING A POLYURETHANE PROPELLANT WHEREIN A DIICYANATE IS POLYMERIZED WTH A POLYHYDROXY ORGANIC COMPOUND IN THE PRESENCE OF A CURING RATE CATALYST, THE IMPROVEMENT COMPRISING: ADDING TO THE COMPOSITION A DIKETO COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
39 words
IN THE PROCESS OF MAKING A POLYURETHANE PROPELLANT WHEREIN A DIICYANATE IS POLYMERIZED WTH A POLYHYDROXY ORGANIC COMPOUND IN THE PRESENCE OF A CURING RATE CATALYST, THE IMPROVEMENT COMPRISING: ADDING TO THE COMPOSITION A DIKETO COMPOUND OF THE FORMULA
References Cited (Backward Citations)
FR1291647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |