US2978377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding butadiene vinylpyridine formulations to metal
Assignee: Phillips Petroleum Co
•
Filing: 1955-10-03
•
Granted: 1961-04-04
•
Expires: 1975-10-03
Abstract
No abstract record available.
Inventors
- 👤 Robert L Hall
- 👤 David R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:43
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B29; B29C; B29C70/00; B29C70/68; B29C70/70; B32; B32B; B32B27/00; F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346; B29K; B29K2009/00; B29K2009/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31855; Y10T428/31909; Y10T428/31924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF SEALING A COMPOSITE PROPELLANT GRAIN COMPRISING AN OXIDANT AND A BUTADIENE-2-METHYL-5-VINYLPYRIDINE BINDER TO THE WALLS OF THE COMBUSTION CHAMBER OF A ROCKET ENGINE, SAID METHOD COMPRISING COATING THE CURED GRAIN WITH A COMPOSITION COMPRISING AN UNCURED POLYMER COMPRISING AT LEAST 50 WEIGHT PARTS OF A CONJUGATED DIENE PER 100 PARTS OF POLYMER, THE REMAINING BEING SELECTED FROM THE GROUP CONSISTING OF VINYL-AROMATIC HYDROCARBONS AND SUBSTITUTED VINYL-AROMATIC HYDROCARBONS, INSERTING THE COATED GRAIN INTO THE COMBUSTION CHAMBER, FILLING THE ANNULUS BETWEEN THE COATED GRAIN AND THE COMBUSTION CHAMBER WALLS WITH A SPONGE COMPOSITION COMPRISING A GAS FORMING COMPOUND AND AN UNCURED COPOLYMER COMPRISING AT LEAST 50 WEIGHT PARTS CONJUGATED DIENE AND 5 TO 25 WEIGHT PARTS OF A VINYLPYRIDINE PER 100 PARTS OF COPOLYMER, AND CURING THE UNCURED COMPOSITIONS.
Claim 2
Independent Claim
130 words
A METHOD OF SEALING A COMPOSITE PROPELLANT GRAIN COMPRISING AN OXIDANT AND A BUTADIENE-2-METHYL-5-VINYLPYRIDINE BINDER TO THE WALLS OF THE COMBUSTION CHAMBER OF A ROCKET ENGINE, SAID METHOD COMPRISING COATING THE CURED GRAIN WITH A COMPOSITION COMPRISING AN UNCURED POLYMER COMPRISING AT LEAST 50 WEIGHT PARTS OF A CONJUGATED DIENE PER 100 PARTS OF POLYMER, THE REMAINING BEING SELECTED FROM THE GROUP CONSISTING OF VINYL-AROMATIC HYDROCARBONS AND SUBSTITUTED VINYL-AROMATIC HYDROCARBONS, INSERTING THE COATED GRAIN INTO THE COMBUSTION CHAMBER, FILLING THE ANNULUS BETWEEN THE COATED GRAIN AND THE COMBUSTION CHAMBER WALLS WITH A SPONGE COMPOSITION COMPRISING A GAS FORMING COMPOUND AND AN UNCURED COPOLYMER COMPRISING AT LEAST 50 WEIGHT PARTS CONJUGATED DIENE AND 5 TO 25 WEIGHT PARTS OF A VINYLPYRIDINE PER 100 PARTS OF COPOLYMER, AND CURING THE UNCURED COMPOSITIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |