US2535705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-neopentyl-1,2-dithia-4-cyclopentene-3-thione and 4-methyl-5-tertiary-butyl-1,2-dithia-4-cyclopentene-3-thione
Assignee: Gulf Research and Development Co
•
Filing: 1947-03-07
•
Granted: 1950-12-26
•
Expires: 1967-03-07
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 William C Starnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:49
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A SULFUR-CONTAINING CHEMICAL PRODUCT SELECTED FROM THE GROUP CONSISTING OF (1)4-NEOPENTYL-1,2-DITHIA-4-CYCLOPENTENE-3-THIONE, (2) 4METHYL-5-TERT-BUTYL-1,2-DITHIA-4-CYCLOPENTENE-3THIONE, AND (3) A MIXTURE OF (1) AND (2).
Claim 2
Dependent Claim
21 words
A SULFUR-CONTAINING CHEMICAL PRODUCT SELECTED FROM THE GROUP CONSISTING OF (1)4-NEOPENTYL-1,2-DITHIA-4-CYCLOPENTENE-3-THIONE, (2) 4METHYL-5-TERT-BUTYL-1,2-DITHIA-4-CYCLOPENTENE-3THIONE, AND (3) A MIXTURE OF (1) AND (2).
References Cited (Backward Citations)
US2402456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |