US2587616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylmercaptoalkyl phosphites
Assignee: Shell Development Co
•
Filing: 1948-07-13
•
Granted: 1952-03-04
•
Expires: 1968-07-13
Abstract
No abstract record available.
Inventors
- 👤 Harman Denham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:41
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/1411; C08; C08K; C08K5/00; C08K5/49; C08K5/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
BIS(3-AMYLMERCAPTOPROPYL) PHOSPHITE.
Claim 2
Dependent Claim
2 words
BIS(3-AMYLMERCAPTOPROPYL) PHOSPHITE.
References Cited (Backward Citations)
US2205021A
Cited
US2241244A
Cited
US2371631A
Cited
US2372244A
Cited
US2432095A
Cited
US2373879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |