US3277029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed compositions
Assignee: Bayer Corp
•
Filing: 1965-10-21
•
Granted: 1966-10-04
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 David H Chadwick
- 👤 Robert K Kirkendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08J2369/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A FORMABLE POLYCARBONATE COMPOSITION COMPRISING A SYNTHETIC ORGANIC POLYCARBONATE RESIN AND OXALIC ACID AS A FOAMING AGENT.
Claim 2
Dependent Claim
17 words
A FORMABLE POLYCARBONATE COMPOSITION COMPRISING A SYNTHETIC ORGANIC POLYCARBONATE RESIN AND OXALIC ACID AS A FOAMING AGENT.
References Cited (Backward Citations)
US2628945A
Cited
US2941964A
Cited
US2966471A
Cited
GB838824A
Cited
US3044970A
Cited
US3075929A
Cited
US3224983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |