US2603573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous mixtures and processes for their preparation
Assignee: Shell Development Co
•
Filing: 1946-08-26
•
Granted: 1952-07-15
•
Expires: 1966-08-26
Abstract
No abstract record available.
Inventors
- 👤 Blott John Frederick Thomas
- 👤 Alexander Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:24
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
4 words
A BITUMINOUS COMPOSITION COMPRISING:
References Cited (Backward Citations)
GB421113A
Cited
US2332260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |