US2658900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfurization of di-isobutylene
Assignee: Gulf Research and Development Co
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Filing: 1951-02-15
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Granted: 1953-11-10
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Expires: 1971-02-15
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 Samuel C Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:48
CPC Classifications
C; C07; C07D; C07D339/00; C07D339/02; C07D339/04; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2443; C10L1/245; C10M; C10M1/00; C10M1/08; C10M2219/00; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10N; C10N2040/00; C10N2040/20; C10N2040/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
IN A PROCESS FOR SULFURIZING DI-ISOBUTYLENE BY REACTING DI-ISOBUTYLENE WITH MOLTEN SULFUR, THE IMPROVEMENT WHICH COMPRISES CHARGING DI-ISOBUTYLENE BENEATH THE SURFACE OF A LIQUID REACTION MASS COMPRISING MOLTEN SULFUR WHILE MAINTAINING THE REACTION MASS AT A TEMPERATURE OF BETWEEN
Claim 2
Dependent Claim
39 words
IN A PROCESS FOR SULFURIZING DI-ISOBUTYLENE BY REACTING DI-ISOBUTYLENE WITH MOLTEN SULFUR, THE IMPROVEMENT WHICH COMPRISES CHARGING DI-ISOBUTYLENE BENEATH THE SURFACE OF A LIQUID REACTION MASS COMPRISING MOLTEN SULFUR WHILE MAINTAINING THE REACTION MASS AT A TEMPERATURE OF BETWEEN
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) | 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 |