Patent US6499109B1 successfully refreshed from Google Patents.
Patent US3914209A successfully refreshed from Google Patents.
US3914209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Difluoroamino polyethers
Assignee: Shell USA Inc
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Filing: 1967-07-12
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Granted: 1975-10-21
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Expires: 1987-07-12
Abstract
Abstract New high energy polymeric materials comprising polyethers having repeating units of are disclosed. Also disclosed are methods for their preparation by adding tetrafluorohydrazine to unsaturated polyethers. The use of the new high energy polymeric materials in making solid propellant binders are also disclosed.
Inventors
- 👤 Walter L Petty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:05
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/02; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5066; C08G18/67; C08G18/6795; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/325; C08G65/329; C08G65/331; C10; C10M; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/105; Y; Y10; Y10S; Y10S149/00; Y10S149/12; Y10S149/122
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
A POLYMER CONTAINING HIGH ENERGY GROUPS WHICH COMPRISES A POLYETHER HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
A POLYMER CONTAINING HIGH ENERGY GROUPS WHICH COMPRISES A POLYETHER HAVING THE FORMULA
Claim 3
Dependent Claim
20 words
A process for preparing high energy polymeric materials which comprises reacting an unsaturated polyether having repeating units having the structure
Claim 4
Dependent Claim
20 words
A process for preparing high energy polymeric materials which comprises reacting an unsaturated polyether having repeating units having the structure
Claim 5
Dependent Claim
17 words
A process for preparing high energy polymeric materials which comprises reacting an unsaturated Polyether having the formula
Claim 6
Dependent Claim
17 words
A process for preparing high energy polymeric materials which comprises reacting an unsaturated Polyether having the formula
References Cited (Backward Citations)
US3347801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |