Patent US2633460A successfully refreshed from Google Patents.
US2633460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature polymerization of vinyl hydroxyalkyl ethers to resinous polyacetals
Assignee: Rohm and Haas Co
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Filing: 1951-09-25
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Granted: 1953-03-31
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Expires: 1971-09-25
Abstract
No abstract record available.
Inventors
- 👤 Harry T Neher
- 👤 La Verne N Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:04
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/18; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/26; C08G2/12; C08G4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A PROCESS FOR PREPARING LINEAR POLYACETALS OF THE STRUCTURE
Claim 2
Dependent Claim
9 words
A PROCESS FOR PREPARING LINEAR POLYACETALS OF THE STRUCTURE
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) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |