US2817878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymeric alpha-chloro-acrylate sheets
Assignee: GAF Chemicals Corp
•
Filing: 1953-05-22
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Granted: 1957-12-31
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Expires: 1973-05-22
Abstract
No abstract record available.
Inventors
- 👤 Harry D Anspon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:45
CPC Classifications
B; B29; B29C; B29C33/00; B29C39/00; B29C39/003; B29C39/006; Y; Y10; Y10S; Y10S425/00; Y10S425/012; Y10S425/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF PRODUCING A POLYMERIC A-CHLOROACRYLATE SHEET COMPRISING SUBJECTING AN A-CHLOROACRYLIC ACID ESTER, IN A CASTING CELL WHOSE CELL WALLS ARE SEALED AT THEIR EDGES AND SEPARATED BY A PLURAILTY OF FUSIBLE SPACERS DISTRIBUTED AT SUITABLE INTERVALS AROUND THE PERIPHERY THEREOF, TO GELLING CONDITIONS AT A TEMPERATURE BELOW THE MELTING POINT OF SAID SPACERS, APPLYING HEAT TO THE SPACERS TO MELT THEM,
Claim 2
Independent Claim
63 words
A METHOD OF PRODUCING A POLYMERIC A-CHLOROACRYLATE SHEET COMPRISING SUBJECTING AN A-CHLOROACRYLIC ACID ESTER, IN A CASTING CELL WHOSE CELL WALLS ARE SEALED AT THEIR EDGES AND SEPARATED BY A PLURAILTY OF FUSIBLE SPACERS DISTRIBUTED AT SUITABLE INTERVALS AROUND THE PERIPHERY THEREOF, TO GELLING CONDITIONS AT A TEMPERATURE BELOW THE MELTING POINT OF SAID SPACERS, APPLYING HEAT TO THE SPACERS TO MELT THEM,
References Cited (Backward Citations)
US2328525A
Cited
US2409958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |