US3075001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of methyl methacrylate
Assignee: WR Grace and Co
•
Filing: 1961-12-22
•
Granted: 1963-01-22
•
Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 John J Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:21
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A METHOD FOR PREPARING METHYL METHACRYLATE WHICH COMPRISES PYROLYZING METHYL PIVALATE AT TEMPERATURES OF FROM ABOUT 550* TO 650*C., AND RECOVERING METHYL METHACRYLATE FROM THE PYROLYSIS PRODUCTS.
Claim 2
Independent Claim
27 words
A METHOD FOR PREPARING METHYL METHACRYLATE WHICH COMPRISES PYROLYZING METHYL PIVALATE AT TEMPERATURES OF FROM ABOUT 550* TO 650*C., AND RECOVERING METHYL METHACRYLATE FROM THE PYROLYSIS PRODUCTS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |