Patent US3917656A successfully refreshed from Google Patents.
US3917656A
Expired / Lapsed
US
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Chemical compounds
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-01-18
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Granted: 1975-11-04
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Expires: 1994-01-18
Abstract
Abstract Azidoformates in which there is at least one group of the formula attached to an aromatic nucleus, R representing an alkyl group of from 1 to 4 carbon atoms or a group of the formula and R1 representing hydrogen, chlorine, bromine, an alkyl radical of from 1 to 4 carbon atoms or a chloromethyl radical. The aromatic nucleus may be substituted. The azidoformates are useful for the treatment of polymeric materials.
Inventors
- 👤 John Buckley
- 👤 Richard Budziarek
- 👤 Andrew John Nicholas
- 👤 Edward Jervis Vickers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:05
CPC Classifications
C; C07; C07C; C07C243/00; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/324; C08G65/325; C08G65/329; C08G65/333; C08G65/33396; C08J; C08J7/00; C08J7/04; C08J7/06; C08J7/065; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/425
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
AZIDOFORMATES OF THE FORMULA
Claim 2
Dependent Claim
4 words
AZIDOFORMATES OF THE FORMULA
Claim 3
Dependent Claim
5 words
An azidoformate of the formula
Claim 4
Dependent Claim
5 words
An azidoformate of the formula
References Cited (Backward Citations)
US3324148A
Cited
US3631183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |