US2658876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazo thioethers as blowing agents in production of sponge rubber and the like
Assignee: Phillips Petroleum Co
•
Filing: 1948-05-20
•
Granted: 1953-11-10
•
Expires: 1968-05-20
Abstract
No abstract record available.
Inventors
- 👤 William B Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:03
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/102; C08L; C08L21/00; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN THE PREPARATION OF A BLOWN RUBBER PRODUCT WHEREIN THERE IS ADMIXED WITH THE MATERIAL FROM WHICH THE PRODUCT IS MADE A BLOWING AGENT WHICH IS DECOMPOSED IN SAID MATERIAL DURING THE PREPARATION OF THE PRODUCT TO CAUSE AN INTERNAL BLOWING EFFECT TO AID IN THE FORMATION OF THE PRODUCT, THE STEPS WHICH COMPRISES INCORPORATING 0.5 TO 10 PER CENT OF A DIAZO THIOETHER BLOWING AGENT IN SAID MATERIAL, SAID AGENT HAVING THE GENERAL FORMULA R-N=N-S-R'', WHEREIN R. IS AN AROMATIC RADICAL AND R'' IS A MEMBER OF THE GROUP CONSISTING OF AROMATIC, CYCLOALKYL AND ALIPHATIC RADICALS AND THEN CAUSING THE DECOMPOSITION OF SAID AGENT.
Claim 2
Dependent Claim
105 words
IN THE PREPARATION OF A BLOWN RUBBER PRODUCT WHEREIN THERE IS ADMIXED WITH THE MATERIAL FROM WHICH THE PRODUCT IS MADE A BLOWING AGENT WHICH IS DECOMPOSED IN SAID MATERIAL DURING THE PREPARATION OF THE PRODUCT TO CAUSE AN INTERNAL BLOWING EFFECT TO AID IN THE FORMATION OF THE PRODUCT, THE STEPS WHICH COMPRISES INCORPORATING 0.5 TO 10 PER CENT OF A DIAZO THIOETHER BLOWING AGENT IN SAID MATERIAL, SAID AGENT HAVING THE GENERAL FORMULA R-N=N-S-R'', WHEREIN R. IS AN AROMATIC RADICAL AND R'' IS A MEMBER OF THE GROUP CONSISTING OF AROMATIC, CYCLOALKYL AND ALIPHATIC RADICALS AND THEN CAUSING THE DECOMPOSITION OF SAID AGENT.
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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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |