US3265730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy polymeric salts obtained by reacting urea-formaldehyde polymers with a strong inorganic acid
Assignee: Bell Aerospace Corp
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Filing: 1959-08-24
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Granted: 1966-08-09
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Expires: 1979-08-24
Abstract
No abstract record available.
Inventors
- 👤 Heubusch Henry Phillip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:00
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C06; C06B; C06B43/00; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE PROCESS OF MAKING A POLYMERIC SUBSTANCE CHARACTERIZED BY ITS ABILITY, UPON HEATING, TO DECOMPOSE TO RENDER SUFFICIENT GASEOUS PRODUCTS AS TO RENDER THE SUBSTANCE USEFUL AS A ROCKET FUEL AND THE LIKE, WHICH COMPRISES MIXING ABOUT ONE MOLE OF UREA WITH ABOUT ONE MOLE OF FORMALDEHYDE AT AMBIENT TEMPERATURE AND PRESSURE, INDUCING POLYMERIZATION BY ELEVATING THE TEMPERATURE OF THE MIXTURE TO THE ORDER OF ABOUT 80*C., ADDING ABOUT TWO MOLES OF AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, PERCHLORIC ACID, SULFURIC ACID AND PHOSPHORIC ACID, AND THEN REMOVING WATER FROM THE SYSTEM AND COMPLETING THE POLYMERIZATION PROCESS BY HEATING THE MIXTURE UNDER REDUCED PRESSURE.
Claim 2
Dependent Claim
108 words
THE PROCESS OF MAKING A POLYMERIC SUBSTANCE CHARACTERIZED BY ITS ABILITY, UPON HEATING, TO DECOMPOSE TO RENDER SUFFICIENT GASEOUS PRODUCTS AS TO RENDER THE SUBSTANCE USEFUL AS A ROCKET FUEL AND THE LIKE, WHICH COMPRISES MIXING ABOUT ONE MOLE OF UREA WITH ABOUT ONE MOLE OF FORMALDEHYDE AT AMBIENT TEMPERATURE AND PRESSURE, INDUCING POLYMERIZATION BY ELEVATING THE TEMPERATURE OF THE MIXTURE TO THE ORDER OF ABOUT 80*C., ADDING ABOUT TWO MOLES OF AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, PERCHLORIC ACID, SULFURIC ACID AND PHOSPHORIC ACID, AND THEN REMOVING WATER FROM THE SYSTEM AND COMPLETING THE POLYMERIZATION PROCESS BY HEATING THE MIXTURE UNDER REDUCED PRESSURE.
References Cited (Backward Citations)
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |